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Chapter Text

221B Baker Street, City of Westminster

A large, muscular man sits slumped over a polished mahogany desk, surrounded by stacks of papers and shrouded in a thick cloud of tobacco smoke. He places the stem of his pipe between his lips and inhales deeply, emitting a gruff sigh of annoyance. 

A sharp rap sounds at the door. Brisk and impatient, it comes again, quicker this time and accompanied by a muffled voice from the hallway.

"Sherlock! Brother, open up!"

Sherlock rises from his seat, his towering frame thudding across the creaking wooden floorboards towards the door. 

As he wrenches it open, he grumbles "Mycroft? What brings you here?" 

Mycroft is slightly shorter and smaller in build unlike his hulking brother, his frame is gaunt and he adorns a scraggly moustache atop his lip, he slides past him into the flat. 

"Well, come in then," Sherlock mutters as he closes the door behind them.

Mycroft fidgets with a pair of leather gloves, twisting and knotting the supple material in his hands, looking nervous. 

"I've got some news, Sherlock, I'm getting married!" He blurts out.

Sherlock's eyebrows arch up in surprise as he regards his brother, a rare display of emotion flickering across his features. 

"Congratulations, brother," he says, clearing his throat and nodding in approval. Extending his large hand to give his brother's shoulder an appreciative slap, a small gesture of support. 

Mycroft's smile widens, the skin around his eyes crinkling as his well-groomed moustache twitches in delight. "Yes, it’s wonderful. I would be honoured if you would be my best man," he says, his voice brimming with genuine appreciation. 

Sherlock is quick to return the smile, a rare sight for those who know him well. "I'd be happy to," he replies, his tone warm and sincere. 

Mycroft pauses for a moment, as if considering something before continuing. "The wedding is in three months' time," he informs Sherlock. "I have matters of her estate and fathers business to attend to in Bristol for the next two months at most. I would appreciate it greatly if you could take care of her during the time I am away, so she is not left alone.” 

Sherlock scoffs in disbelief, his bright blue eyes widening in shock. "What about her parents? You expect me to house an unmarried woman in my flat for two whole months, do you not think of the scandal that would cause?” 

Mycroft sighs. “Please brother, two months no more. I would not ask if I were not desperate. Her mother died during her birth, and her father passed away recently due to Scarlet fever, leaving her with everything. She has no one else and I cannot bring her with me. I will be back as soon as I can, people will understand in these circumstances.” 

Sherlock paces around the small flat, the floorboards creaking under his weight as though groaning in protest. “This is a ridiculous idea, brother! I cannot fathom the unrest this would cause. Mrs. Hudson, she thrives on gossip and this would be cannon fodder for every scandal sheet in London! I do not care much for scandal but this would surely ruin her. Mycroft Holmes’s soon-to-be wife, housed with a bachelor under one roof? Mycroft, do you not think?”

“Sherlock I beg of you, she has no one else. No mother, no father, no far off aunties or uncles. You are my only brother and I trust you in this situation, she is to be my wife and I would not see her safety compromised. You may not care for scandal, but I know you care for me. Do this for me, and I shall be in your debt.”

Sherlock’s broad shoulders slump, making him seem suddenly smaller. He stares into the smoke-hazed air, silent, as though warring with himself. He exhales, a long, reluctant sigh. "When do you leave for Bristol?" He asks. 

Mycroft's grey eyes bulge in surprise, he smiles wide and pulls his brother in for a strong hug. “Oh Sherlock thank you, I leave next Wednesday, I can drop her off that morning at seven sharp.” 

Sherlock nods once, grimly. "Very well," he murmurs, slipping his pipe from his lips. "But know this, Mycroft, I do this for her, and for you. Not for society."

——

A series of loud thuds rattles the front door, dragging Sherlock out of uneasy sleep. He groans, rolling onto his back before sitting upright, irritation etched across his face. The knocking persists, quick and insistent. With a grunt, he shrugs on his blue silk robe and walks barefoot across the creaking boards.

As he yanks open the door and sees his older brother with a look of annoyance etched across his sharp features. And standing beside him, an incredibly beautiful young woman dressed in a soft lilac dress that drapes elegantly to the floor. Her dark, wavy hair falls over her shoulders, and her piercing forest green eyes, bold and bright stare inquisitively at Sherlock. 

Sherlock feels a rare wave of embarrassment, as he remembers that he is still in his night attire. 

"You brute!" Mycroft scolds. “I told you seven sharp."

Sherlock lets out a tired exclamation as he steps aside to let his brother and the woman enter. Mycroft drags in three large suitcases, their weight causing a heavy thud as they land on the floor. 

"Darling, you needn’t have brought half your library," Mycroft remarks, glancing at the luggage. 

The young woman smiles, rolling her eyes. "You are leaving me for two months, Mycroft. I must have something to occupy myself with." 

Mycroft softens at her tone, taking her lace-gloved hands and pressing a kiss to them both. "I am sure my brother will be tolerable company," he said, turning towards Sherlock. "Isn’t that so, brother?” 

Sherlock’s gaze flicked from her to him, his face blank. "I am not a court jester, Mycroft. She will manage her own amusement while I am about my work."

That makes her laugh lightly. Making Sherlock turn away sharply, uncomfortable at the light sound. 

Mycroft clears his throat, “Now darling, are you absolutely sure that you don’t require a maid or just some help while you’re here? It would certainly be more proper.” 

The young woman huffs, waving away the idea. “Mycroft I am not a child, I can fend for myself and a chaperon would only get in the way."

Sherlock raises a brow at the bold notion, but decides to keep quiet.

Mycroft gives a short, incredulous laugh, glancing between the two of them. “Striking how very modern you two are, quite liberal in your beliefs.” There’s a trace of fondness in his voice. “Very well. I trust you both.”

After exchanging goodbyes, Mycroft promises her that he will write to her regularly and keep her updated on the circumstances of her estate and that they will soon be back together to resume wedding planning. 

She stands awkwardly in the middle of the room, her hands behind her back. "Mr. Holmes…” she smiles sweetly at him. “I must thank you for taking me in," she says, breaking the silence. 

Sherlock nods, tightening the sash of his robe around his waist, a soft blush rising up to his cheeks. “Sherlock will do. You are soon to be family, after all. Forgive me, but Mycroft neglected to tell me your name," he exclaims. 

The woman smiles, teeth flashing white as she extends her hand towards him. "Arabella Violet Bellamy," she introduces herself. 

“Bellamy?” Sherlock’s brows rise sharply. “Your father was the proprietor of the largest leatherworks in England.” 

"That’s the one," she replies, her voice softening. "I’ve been rather at a loss since his passing. I am thankful to your brother, he will see to that everything is settled. Once we are married, the matter will be simpler."

He is acutely aware of the softness of her skin, even through the fine lace gloves she wears. A faint trace of lavender lingers in the air, her perfume, delicate and floral. 

Sherlock withdraws his hand feeling foolish. He had always prided himself on remaining impervious to the charms of the fairer sex and yet here he was unsettled by the presence of this woman, and not just any woman. His brother's fiancée.

Sherlock works to compose himself before speaking. “Miss Bellamy, allow me to show you to your room,” he says, his voice steadier than he currently feels.

——

Arabella sits at the small, dark-wood dining table, a book in one hand and a spoon in the other idly stirring a bowl of steaming porridge. She drizzles in a ribbon of warm, rich golden honey, watching it disappear as she folds it into the pale mixture.

The door creaks open behind her. Sherlock emerges, already fully dressed, coat buttoned, cane in hand. 

“Forgive me for leaving you to breakfast alone,” he says, already halfway toward the door. “Word has just come from Scotland Yard, there has been a robbery at the Bank of England. My presence is required.”

“A case?” Arabella asks, her voice bright with intrigue. She sits up straighter, spoon and book forgotten, eyes glinting with excitement.

Sherlock glances at her, one brow lifting at her sudden interest. “Yes,” he replies slowly, suspicion flickering in his tone. “Though I fail to see how that concerns you.”

Arabella leans forward, resting her arms on the table, the corners of her mouth tugging into a mischievous smile. “Oh, come now, Sherlock. You can’t expect me to sit here reading while you’re off chasing robbers and mysteries,” she teases, gesturing to the book beside her bowl.

Sherlock exhales sharply through his nose, irritation threading his words. “You are not coming to a crime scene, Miss Bellamy.” 

Arabella tilts her head, that familiar spark of determination lighting her eyes. “We’ll see about that,” she says lightly. 

Sherlock feels a faint, sinking certainty that he’s already lost the argument. 

His gaze flicks down to the book on the table. “Mary Shelley’s Frankenstein? Is that the sort of books you read Miss Bellamy, full of monsters and myth? I would have expected a woman like you to prefer the works of Charlotte Brontë or Jane Austen,” he says, curiosity piqued despite himself.

She scrunches her nose, unbothered by his scrutiny. “Sherlock, please just call me Arabella. Miss Bellamy sounds dreadfully formal. And I find romance stories quite a bore. There’s far more adventure to be had in the darkness, with the monsters,” she replies, eyes shining with excitement. “But do not change the topic of discussion Sherlock," she says in exasperation. “I wish to come with you!”

“This is hardly child’s play, Miss— Arabella,” he corrects himself, tone clipped. “Crime scenes are not for the faint-hearted or the untrained eye. There’s mud, dust, and evidence that must remain untouched. And having you there could very well create a scandal, a young lady at a crime scene with a bachelor detective? It’s hardly proper.”

She stands then, smoothing her dress, a teasing smile tugging at her lips. “Well, I do know my shoes, Sherlock. Having a father in leatherworks comes in handy. And I can behave.”

Sherlock narrows his eyes, weighing his options as though arguing with himself. He exhales a long breath through his nose, eyes flickering shut for a moment. “Very well. But you are to remain strictly by my side. Touch nothing, step nowhere I haven’t indicated, and keep your voice low. One misstep, and you could compromise the entire investigation.” 

The corners of her soft lips twitch, betraying the amusement she can no longer hide. “Yes, sir,” she replies, tone laced with mischief. “I shall be a perfect pupil.” 

Sherlock notices and despite himself, something in his chest softens. He quickly looks away, muttering something unintelligible under his breath as if to shake the thought off.

——

Bank of England, Threadneedle Street

Sherlock and Arabella arrive at the Bank of England. There is a light breeze in the air, the weather is warm and inviting. 

Inspector Lestrade stands outside, wearing a grey suit. His thick, black moustache bristling in irritation as his eyes flick from Holmes to the young woman at his side. “Holmes,” he says slowly, head cocked, “and who might this be?”

Sherlock exhales, jaw tightening. He had endured Arabella’s coaxing all morning until his resolve had cracked. 

God help me if this ends up in the scandal sheets, he thinks, his gloved fingers tightening around the silver head of his cane. “This is Miss Arabella Bellamy,” Sherlock replies curtly. “She is accompanying me to gain an understanding of the work we do. Nothing more.”

Lestrade arches a brow, his eyes narrowing at the word accompanying. “Unusual company for you, Holmes. Scotland Yard isn’t a drawing room, and crime scenes are hardly the place for ladies.”

Before Sherlock can answer, Arabella steps forward, her chin lifting in quiet defiance. “On the contrary, Inspector. Having grown up amidst my father’s leather works, I know more about shoes than most cobblers. Footprints hardly frighten me.” 

Sherlock cuts her a sharp look, irritation lacing his features. He had told her not to speak unless spoken to, silly of him to believe a woman like her would listen to instructions. 

Lestrade, baffled but unwilling to spar with a woman, mutters something under his breath and waves them inside.

Inside the great hall of the bank, hushed whispers weave through the vast, echoing chamber. Uniformed officers linger, their polished boots scuffing faintly against the marbled flooring. The evidence of the robbery is clear: a side door lock splintered by some heavy instrument, a scatter of ledgers left abandoned, and, most telling of all, chalk marked muddy footprints. 

Sherlock strides in, his polished cane clicking sharply against the stone floor. The quiet murmur of voices falters, gazes shift, and the room seems to pause at his arrival. His sharp eyes sweep across the hall, practised and methodical, taking in every detail as though the scene were already laid out on the pages of a book.

Arabella follows at his side, her steps softer, her presence quieter, though no less observant. Where Sherlock’s presence demands attention, Arabella slips unnoticed, giving her space to study. Her wide eyes shine with curiosity, eager to catch details he might dismiss.

A few officers glance at one another, their whispers turning curious, even edged with gossip. It is not every day Sherlock Holmes appears at a crime scene with a lady at his side. 

Sherlock ignores the whispers, his jaw set. He has no patience for idle gossip. 

“Stay close. And do not touch anything,” he mutters under his breath. Arabella gives him a sharp nod, lips pressed together in a smile.

Lestrade clears his throat, tugging at his moustache as he gestures towards the cordoned-off section near the side door. “This way, Holmes. We’re just in the middle of preparing the plaster casts.”

Sherlock falls into discussion with the inspector, his baritone low and measured, while Arabella’s gaze drifts toward the man kneeling with a bowl of plaster of Paris. Her attention slips past him to the muddied impressions on the floor. The footprints are uneven, one sturdier than the other, the stride inconsistent. Fascination sparks in her eyes.

Before she even realises it, she bends down, pressing her fabric-covered knees to the cold stone, leaning closer to study the marks.

There’s a sudden chill at her throat, a polished cane slips beneath her chin, tilting her face upward. Sherlock stands over her, blue eyes cool, mouth in a thin line. He tuts softly, the sound sharp and unapproving.

“What did I say?” he grumbles.

“Limp!” she fires back, making him falter. His brows draw together in momentary confusion. “He has a limp,” she repeats, chin lifting defiantly.

Sherlock’s gaze flicks toward the muddied footprints, sharp calculation sparking behind his eyes. Slowly, he lowers the cane, now using it instead to nudge away the boy kneeling with the plaster mixture. He studies the uneven stride, the irregularity of each print. 

For the briefest instant, something shifts in his expression. Admiration, although reluctant and fleeting, softens the severity of his gaze. He glances up at her, the corner of his mouth threatening the ghost of a smile before he smothers it. 

“Not bad,” he mutters, more to himself than to her.

Then, briskly, as though the moment had never occurred, he straightens, using his cane to hover over a partial imprint pressed into the mud. “Manufacturer’s logo,” he murmurs, “though not much to go on. Could be a capitalised R, P… or B.” 

Arabella leans closer, eyes narrowing, fingers itching to trace the faint impression in the dirt. “It’s… my father’s company,” she breathes, a mix of shock and disbelief in her voice. “I recognise the slight impression of the filigree near the letter.”

Sherlock’s head snaps up, his eyes narrowing. “Your father’s?” he repeats, voice low. “You’re certain?”

She nods, still staring at the mark. “Quite.”

He regards her for a long moment, lips pressing into a thin line. “Curious,” he says at last. 

“Of all the manufacturers in London, the thief happens to wear your family's make of boot. Either coincidence has a cruel sense of humour… or this case has just become far more complicated.”

Lestrade steps a little closer, hands tucked behind his back, deep eyes quietly observing the unlikely pair. There’s something about the way Arabella leans in, studying the footprints with an intensity that mirrors Sherlock’s own, that catches his attention. 

He clears his throat softly, tugging and twirling at his moustache. “Holmes,” he mutters under his breath, “I must say… she seems sharper than most. I half expected a lady of her station to fuss over her skirts or faint at the sight of mud.” 

His gaze flickers toward Arabella, noting how naturally she absorbs the evidence. “Where did you find her, if I may ask? She’s not the type I’d expect wandering about crime scenes.”

Sherlock glances at him briefly, a faint crease forming between his brows, but he offers no answer. Arabella, catching the exchange, tilts her head, a small smile tugging at her lips, clearly pleased to have impressed even Lestrade.

Lestrade lets out a low whistle. “Well, she seems to know her way around boots and leather… and I dare say, she might just be useful.” 

Sherlock’s gaze drifts back to the footprints, lips pressing into a thin line. “Observe, Lestrade,” he says pointing with his cane, voice low and precise. “The thief entered through the side door, broke the lock cleanly, and made no unnecessary movements. He knew the layout of the building and the vault, mostly working in darkness. Notice the speed. Nothing is left behind except the footprints and a scattering of mud from the threshold. Every step measured, every object handled with care.”

Arabella leans closer, eyes bright with curiosity. “Remarkable,” she murmurs, tracing a finger near the impression of a sole, careful not to disturb the evidence. “And the limp?” 

Sherlock flicks a glance at her, blue eyes sharp. “Yes. One stride is shorter, the weight uneven. Subtle, but noticeable to the trained eye. I suspect the perpetrator has an injured leg, or is favouring one side deliberately to mislead.”

Lestrade steps forward, brow furrowed. “So, they planned this meticulously, then. Fast, quiet, precise and almost entirely in the dark. And you say they left nothing else?”

“Precisely,” Sherlock confirms. “Footprints, mud, and a few disturbed ledgers. The rest… nothing. No fingerprints, no tell-tale signs of haste beyond the obvious, except the maker’s mark on the boots.” His eyes flick to Arabella, the faintest trace of reluctant admiration lingering in his gaze. “Which, in a most curious coincidence, belongs to Miss Bellamy’s family.”

“Perhaps the thief is a wealthy client?” Arabella interjects, adding to Sherlock’s hypothesis. “It would also explain how they knew their way around the building in relative darkness. To afford such expensive dress shoes, definitely not the typical footwear made for the cobbled streets of London, the soft Bristol sourced leather would wear too quickly. You need much tougher and rugged soles for the city which suggests an outsider, someone not from here.”

Lestrade glances between them, nodding slowly. “Remarkable,” he mutters. “She really does have the makings of a detective herself… sharp eyes, quick of mind, and unafraid of the evidence. I can see why you brought her along, Holmes.”

Sherlock gestures toward the boy crouched with the bowl of plaster. “You there! Are you nearly ready? These footprints won’t preserve themselves.” 

The boy looks up quickly, his eyes go wide, he’s startled but eager to please. “Yes, Mr. Holmes, sir. The mixture’s ready to pour, just waiting on your word.” 

Sherlock quietly resumes his discussion with Lestrade as they wait for the plaster to set, their voices low against the hush of the bank. 

The quiet is broken by distant, mournful howling of dogs somewhere in the city, their cries long and uneasy. 

Arabella glances toward the tall windows, her dark brows knitting together. “Those damned dogs again,” she murmurs. “They’ve been restless since last night.”

Sherlock pauses mid-sentence, his gaze flicking briefly toward the sound and then settles on Arabella. “Something’s bothering them,” he says, his tone thoughtful rather than dismissive. “They sense something coming. A storm, most likely.”

Chapter Text

Back at 221B, Sherlock’s large frame is folded awkwardly on the hard wooden floor, surrounded by a chaotic pile of papers, sketches, notes, and rubbings taken from the crime scene. The fire burns low, casting eerie shadows over the strewn papers and walls. 

His sharp eyes remain fixed on the crumpled pages in his hands, brow furrowed in thought. It isn’t until a pair of bare feet come into view that his concentration falters. He looks up, calm blue eyes meeting Arabella as she stands over him holding a tray of tea.

“It’s time you took a break, Sherlock,” she says softly, a hint of teasing warmth in her voice.

He exhales, the sound heavy and weary. Instead of arguing, he simply reaches for the cup she offers. “You’re a persistent woman, Miss Bellamy,” he murmurs, the words threaded with dry amusement.

She settles opposite him, legs neatly folded underneath her dress. The warmth of the fireplace and the streetlights outside painting her a soft gold glow. The familiar hum of Baker Street outside is a faint sound of carriage wheels, peoples voices, and wind rustling through trees. 

Arabella takes a careful sip of her tea, watching him over the rim of her cup. “You’ve a mind that never rests,” she says quietly. “Was it always that way? Even as a boy?”

He glances up, surprised by her question. “I can hardly remember a time when it wasn’t,” he admits quietly after a pause. “I learned early on that observation was a safer companion than conversation. Mycroft took to politics and I took to puzzles. It seemed like the logical route.”

Arabella tilts her head, her voice gentle. “That sounds lonely.”

Sherlock looks down into his tea, the faintest curve of a smile at one corner of his mouth. “It’s less lonely than people think,” he says. Then, after a moment of silence adds: “Until someone comes along and insists on sharing the floor.”

Arabella’s cheeks warm, a soft flush rising as a small smile tugs at her pink lips. She lowers her gaze to the cup between her hands, letting the steam shield her from the intensity of Sherlock’s eyes.

Sherlock clears his throat, a small, awkward sound betraying more discomfort than he’d care to admit. “So,” he begins, his tone casual, “how did you come to be engaged to my brother?”

Arabella looks up, her entire face brightening at the mention of her fiancé. “My father introduced us,” she says, her lithe fingers idly tracing the rim of the teacup. “He spoke to me beforehand, saying I was to meet a man from a well-known and respectable family. He never mentioned a name, only that the family was distinguished.” Her eyes sparkle with fond amusement. “He also added that they had famous ties… including a detective of noteworthy reputation.”

She lifts her gaze to Sherlock, a playful glint in her eyes. “Naturally, I assumed he meant you.”

Sherlock breathes a small huff through his nose, something close to a laugh. “My reputation precedes me, then,” he murmurs. 

Arabella’s smile deepens, a soft flush rising to her cheeks in embarrassment. “Well,” she says, swirling her tea, “I had an inkling the man my father mentioned might be a Holmes. He hinted enough about brilliance and notoriety.” Her gaze flicks to him, amusement shining in her green eyes. “But I assumed it would be you specifically.”

He looks up, startled, eyes as big as saucers. “Me?”

She nods, a touch bashful but unable to hide her grin. “I’d seen you in the papers more than once. Brilliant detective, eccentric habits, feared by London’s criminal underworld…” She pauses, then adds with a slightly embarrassed laugh, “And I thought you handsome. So when my father spoke of a detective in the family, I… well, I was excited. I thought it must be you.”

Sherlock blinked, and for a moment his composure slipped. Surprise softening the hard edges of his expression. “I see,” he said quietly, his voice had lost its usual cool precision. “I imagine that disappointment was… considerable.”

“No,” she replied laughing lightly. “Not disappointment, just surprise. Mycroft is kind, steady and easy to talk to.” She hesitated for a moment, then added, “But you were the Holmes I’d pictured.

Sherlock leans back slightly, slowly studying her, a faint curve of a smile tugging at the corner of his lips. “And does the reality of me live up to the expectations you formed from the papers?” His tone is teasing, though there’s a glimmer of genuine curiosity.

Arabella pauses, her smile widening, eyes sparkling. “Well… yes, in ways I hadn’t expected,” she admits, her voice soft. “Though perhaps more… more human than I thought.”

Sherlock shifts, almost uncomfortable. “Human… I’ll take that as a compliment.”

Arabella smiles, resting her chin atop her knees as she watches Sherlock sip his tea in silence. For a moment, the world seems to slow down, the fire low, the room hushed. An intimacy settling between them that feels almost fragile.

It shatters with the sudden, sharp yelp of a dog from the street below.

Her smile fades at once. Arabella turns toward the window, where the warm glow of the streetlamps bleeds through the glass, casting long, wavering shadows across the room and lending an eerie quality to what should have been an ordinary London night.

“London doesn’t usually feel like this,” she murmurs, worry creasing her brow.

Sherlock watches her closely now, his tea forgotten midway to his lips, his expression is unreadable. After a pause, he lowers the cup of tea, fingers tightening slightly around the fragile porcelain. “You’re right,” he says at last, quieter than before. “It doesn’t.”

A muscle ticks  in Sherlock’s jaw, eyes drifting briefly toward the window before returning to her. “You’re not imagining it,” he says at last. “Patterns change before events do.”

——

Sherlock strides into the flat, the morning’s post clutched in one large hand. “Arabella!” he calls, his voice carrying easily through the rooms.

A moment later she appears in the doorway hair in loose waves, curiosity sparking in her eyes. Her gaze drops at once to the envelope he is already waving, the seal unmistakable.

Her face brightens instantly. She crosses the room in quick steps, plucking the letter from his grasp before he can say another word. “Finally,” she breathes, already tearing it open.

Arabella unfolds the letter at the small table by the window, sunlight catching the soft cream paper as she reads.

My dearest Arabella,

I trust this letter finds you settled and comfortable at Baker Street. I regret that circumstances required my departure to be so abrupt, though I am relieved to know you are in capable hands of my brother. 

The affairs concerning your parents’ estate have proven rather more involved than I initially anticipated. Certain business interests, and particularly those connected to the overseas holdings require closer examination before matters may be concluded with confidence. It is tiresome work, but necessary.

I hope you are keeping well and that my brother has not been too taxing a host. Sherlock is not known for his consideration of domestic comforts, but I trust his attentions are sincere, if unorthodox.

I anticipate that once these complications are resolved, we may proceed with our wedding plans as intended. Until then, I ask only for your patience, which I know you possess in abundance.

Yours faithfully,
Mycroft Holmes

Sherlock sits at his desk nearby, fingers thumbing through the morning papers. At first, he keeps his gaze lowered, granting Arabella the courtesy of privacy. But the rustle of paper slows, he stops and his eyes lift of their own accord.

“All well?” He asks. 

Arabella glances up, momentarily surprised, then smiles. “Yes,” she replies. “Just business, as always.”

Sherlock nods his head towards her, quietly relieved that no shadow seems to linger in her expression. He returns the paper to the desk, as though the thought has only just occurred to him.

“I may have a lead on the bank robbery,” he says.

“Oh?” Arabella’s interest brightens. “A clue?”

“Possibly.” He rises, hands clasped behind his back as he begins to pace. “There’s to be a performance at the theatre the next three nights. A new play by a playwright from New York, currently enjoying rather enthusiastic praise. The audience will be… affluent.” His mouth quirks slightly. “If our man wishes to appear respectable, I imagine he will be there.”

“And if he isn’t?” she asks.

“Then,” Sherlock replies, glancing at her. “There is no great crime in a change of scenery nor in spending an evening away from the confines of Baker Street.”

Her smile lingers, and for a moment the case feels less like a necessity and more like an invitation.

Chapter Text

On the night of the play, Sherlock briefs Arabella with precision as their carriage rattles through the cobbled streets. He speaks in low tones, outlining what to watch for. Not the obvious displays of wealth, but the subtler tells: a man too alert for entertainment, eyes that wander the exits more than the stage, hands that never seem to quite relax.

“Observe the audience,” he murmurs. “Not the actors. The guilty are rarely interested in spectacle.”

Arabella listens intently, nodding along and committing every word to memory, her delicate gloved hands folded neatly in her lap. “So not who wishes to be seen… but who wishes to disappear.”

A faint flicker of approval crosses his features.

“There’s something else,” Sherlock adds, after a pause. “Watch how people react to me.”

She turns her head in slight confusion, curiosity sparking in her eyes.

“My presence unsettles certain types,” he continues, matter-of-fact. “Men with something to hide often recognise the threat before they understand it. A glance held too long, a sudden stiffening, a change in posture when they realise who I am, those reactions are rarely accidental.”

Arabella considers this, her gaze sharpening. “So I should watch out for fear.”

“For recognition,” he corrects quietly. “Fear comes after.”

Theatre Royal, Haymarket

Sherlock is dressed in a tailored black suit, severe and understated, blending seamlessly into the crowd he intends to study. Arabella is the opposite. She wears a luxurious deep red gown, the rich fabric skimming the floor as she moves, catching the light with every step. However, it is elegant rather than ostentatious.

As they step into the theatre, murmurs ripple through the foyer. Curious people turn to look, Sherlock feels it immediately, the heavy weight of eyes and the beginnings of whispers. He resists the instinct to place himself between her and the crowd as he feels her hand tighten on its place at the crook of his arm. 

“Remember,” he adds softly, as they leave their coats, “we are merely patrons enjoying a play.”

Arabella’s lips curve into a knowing smile. “Of course,” she replies. “Though I suspect we’ll be far more interesting to observe than the performance itself.”

For the first time that evening, Sherlock allows himself the smallest smile.

During the interval, Arabella and Sherlock move slowly through the crowd, both of them observing. She knows what she is meant to be looking for, Sherlock had told her as much. Recognition. A flicker of unease, a tightening of posture, someone who reacts too quickly or too carefully upon seeing him.

Although it proves more difficult than she expected.

With someone like Sherlock, recognition is nearly universal. Heads turn as he passes, conversations falter for a beat, eyes linger with curiosity or quiet awe. There is no single reaction to single out, no obvious tell; everyone knows who he is, or at least knows enough to look twice. The very thing she is meant to watch for is everywhere at once.

Sherlock appears indifferent to it, his gaze already cataloguing faces and exits, but Arabella feels the attention keenly. Not loud or theatrical, just subtle shifts in the air. A lowered voice. A glance exchanged between strangers. A pause that lasts half a second too long.

If there is anything to be learned here, it will not announce itself plainly.

She becomes aware, too, of the looks cast her way. Curious, appraising. A woman at Sherlock Holmes’s side, unchaperoned. She straightens instinctively, schooling her expression into something composed and unreadable.

Heat creeps up Arabella’s neck, her skin flushing as the press of the crowd closes in. The attention is subtle but constant and makes her chest feel tight, her breath a touch too shallow. Without quite realising she’s done it, her fingers curl into the fabric of Sherlock’s sleeve, gripping his bicep as though to anchor herself.

He feels it immediately. His steps slow, and he looks down at her, sharp eyes softening with concern.

“What is it?” he asks quietly.

“Nothing… just a little warm,” Arabella replies, forcing a small smile. Her breath comes quicker than she intends. “It’s stifling in here, isn’t it?”

Sherlock doesn’t argue. He turns at once, his hand closing over hers, guiding her away from the curious hum of the crowd and into a dimmer, quieter recess of the theatre. Arabella exhales as she leans back against the cool brick wall, the chill seeping through the thin fabric of her dress, grounding her.

Then she feels his hand at her cheek. Large, steady, and impossibly gentle, tilting her face upward. She meets his gaze, struck again by the startling blue of his eyes, it makes her breath hitch. 

“You are warm,” he murmurs, thumb brushing lightly along her jaw. “Stay here. I’ll fetch you some water.”

Reluctantly, his hand falls away but the imprint of it lingers long after he turns to go.

Arabella presses the cool rim of the glass to her lips, drinking deeply. The water is grounding, a shock against her tongue, and she savours the way it cools her throat, and steadies her breathing.

“Better?” Sherlock asks, his voice low.

She nods. “Yes. Thank you.”

After a moment, she adds more quietly, “There are far more people watching than I expected. It feels as though everyone is speaking about you, or about us.” Her fingers tighten briefly around the glass. “The stares… it’s suffocating.”

Sherlock gives a soft hum of understanding. “It isn’t always like this,” he says. “The upper tiers of society tend to gawk. I don’t often attend affairs such as these, so they assume my presence must have a purpose.” A faint, dry note enters his voice. “And in this case, they aren’t entirely wrong.”

Sherlock studies the press of bodies in the foyer for a moment longer, his gaze sharp but thoughtful. He can feel the tension in Arabella beside him, the way her shoulders remain slightly raised, the careful way she breathes as if the room itself might close in.

“This is proving counterproductive,” he murmurs.

She glances up at him. “The investigation?” she asks, though her voice betrays that she knows he means more than that.

“You,” he says plainly. His eyes flick toward the narrow stairwell leading up the side of the theatre. “There are side balconies which are rarely used, poor sightlines for the stage but an excellent view of the audience. Fewer people. Fewer eyes.”

Arabella hesitates only a moment before nodding. “That sounds… welcome.”

Sherlock takes her hand in his and leads her up the staircase and away from the crowd of people conversing in the foyer, the noise dulls and the air cools. The side balcony is dim, tucked away like an afterthought, its railing worn smooth by time rather than use. From here, the theatre opens beneath them in a soft glow of gaslight, faces turned toward the stage, unaware.

Arabella exhales, the tension easing from her frame almost immediately. “Oh,” she breathes, relieved. “It’s quieter.”

“Precisely,” Sherlock replies.

As the orchestra swells below, he positions them near the wall, partially obscured by shadow. Without quite thinking Sherlock places a hand at her waist, pulling her close. It is an unmistakably intimate gesture. Unnecessary. Improper.

He knows it the moment he does it. 

Arabella stiffens for a fraction of a second, then relaxes, leaning subtly into his touch. The warmth of her seeps through the layers of fabric, grounding her. Grounding him. She can hear his breathing at such close proximity, slow, steady, unhurried. It anchors her. Without quite realising it, she lets her own breath fall into rhythm with his, tension easing from her shoulders as calm settles back into her body.

“Is this all right?” he asks quietly, his voice carefully neutral.

“Yes,” she answers just as softly. “It helps.”

He keeps his hand where it is.

From above, they watch the crowd instead of the stage. Sherlock notes the easy way her shoulders loosen now that Arabella is removed from the crowd, the way her gaze sharpens again, observant rather than overwhelmed. He follows her line of sight, watching for the thing he asked her to notice, not recognition exactly, but something close to it. A flicker. A hesitation. A man who looks too often toward Sherlock Holmes and then away again.

Below them, a few heads turn instinctively toward Sherlock’s familiar profile, but the balcony’s shadows keep them indistinct, anonymous. For once, he is grateful.

Arabella tilts her head toward him. “This was clever,” she murmurs. “You always find the quiet corners.”

He smiles. “Noise is rarely where the truth reveals itself.”

The play unfolds beneath them, dramatic and loud, but here, half-hidden, close enough to feel one another’s breath everything is hushed. Sherlock doesn’t move his hand from her waist, though he is acutely aware of it, of the scandal it would cause if seen.

For now, unseen suits him just fine.

——

When the play finally draws to a close, they step out into the night together, the cool air washing over them and cutting through the lingering warmth of the theatre. Arabella exhales softly, disappointment settling in her chest. The evening had yielded no new clues, no answers to justify the tension and scrutiny. Sherlock, by contrast, appears unfazed, his expression already distant and contemplative, as though the absence of progress is merely another piece of the puzzle rather than a failure.

Sherlock tilts his head back, his gaze lifting to the sky where the moon hangs large and bright, washing the streets in pale silver light.

“It’s a fine night,” he says with a quiet sigh. “Let’s walk back to Baker Street.”

Arabella hesitates, her eyes tracking the flow of theatre-goers as they disperse into carriages and hired cabs, laughter and silk brushing past them. She leans closer, lowering her voice so only he can hear.

“Wouldn’t it be… improper to be seen walking with you like this?” she asks, uncertainty threading her words. 

Sherlock glances at her, then gives a careless shrug, entirely unbothered.

“Let them talk,” he replies evenly. “We’re merely walking. There’s nothing scandalous about friends sharing a stroll, no matter what society chooses to imagine.”

Arabella’s shoulders sink, a small frown tugging at her lips. 

“May I remind you, Mr. Holmes,” she says quietly, “that it is the woman’s reputation that stands in peril. Society expects men to misbehave.” She lifts her gaze to him, steady and pointed. “We are held to higher standards and I would bear the full weight of it.”

Sherlock offers a soft, almost rueful smile, his hand lifting to rest lightly on her shoulder. “I promise you, nothing will happen,” he says gently. “We are doing nothing improper.” His thumb shifts, adding a subtle, reassuring pressure. “And with Mycroft away, I am by his own insistence, your chaperone.”

——

They walk beneath the gaslit lamps, hands kept carefully at their sides, though now and then their fingers brush, an accidental graze neither of them acknowledges. Each fleeting contact sends an unwelcome warmth through Arabella, a spark she tries not to dwell on. Through her gloves she feels the solid press of his knuckles, and the thought intrudes, of how it might feel without the barrier of fabric, skin against skin.

The notion unsettles her as much as it tempts. Even on these near-empty streets, the risk of scandal coils tightly in her chest. It would take only one watchful pair of eyes, one careless whisper, to undo her entirely. Mycroft would not dare bind himself to a woman whose reputation had been compromised or risk the Holmes name for her sake. The weight of that knowledge keeps her steps measured, her hands restrained, no matter how her pulse betrays her.

Arabella’s gaze drifts upward, settling on the moon, nearly full now, pale and watchful against the darkness.

“You know, Sherlock,” she says lightly, though there is a thoughtful edge to her tone, “I’ve read some medical papers that suggest men are more prone to violence during the full moon.”

He lets out a dismissive huff. “You read too many fanciful stories.”

“No, truly,” Arabella insists, turning her eyes back to him. “Some physicians have written on it. I don’t know if it’s been proven, but there are theories. Perhaps something old and instinctive, a remnant from long before we learned to call ourselves civilised.”

Sherlock follows her gaze to the sky, studying the moon for a moment before giving a faint, almost wry smile. “Well,” he says, “it’s fortunate, then, that the moon isn’t quite full yet.”

She arches a brow, amused. “And what happens when it is?”

He shrugs lightly. “Then I suppose we’ll find out whether people really are as rational as they like to believe.”

They walk on in silence, their footsteps soft against the stone. The street narrows, the gaslight thinning until shadows gather thick at the edges of the road.

Arabella slows first.

“There” she says, then stops.

Something lies near the curb, half caught in the light of a lamp. At a glance it looks like rubbish, a dark bundle left behind. Then the fur catches the glow.

She draws in a sharp breath.

“S— Sherlock.”

He follows her gaze at once. A cat lies twisted on the stones, its body unnaturally still. One paw is bent at a wrong angle, the neck torn in a way that makes Arabella look away. Deep crimson pooling beneath the animal. 

“Oh,” she murmurs. “Poor thing…”

Sherlock steps in front of her without thinking, blocking her view. He crouches, careful not to touch, his eyes sharp as he takes it in, the depth of the wounds, and the force behind them.

“This wasn’t another cat,” he says quietly. “And it wasn’t hunger.”

Arabella folds her arms, suddenly cold. “Then why do this?”

He doesn’t answer right away. Instead, he looks down the street, at the dark windows, the empty road, the narrow alleys branching off into shadow.

“Whatever did this,” he says slowly, “wasn’t frightened. And it wasn’t rushed.”

Her throat tightens. “You make it sound deliberate.”

His jaw sets. “I think it was.”

For a moment, the city feels different. Closer, heavier. When they finally move on, Arabella stays close to him. Sherlock finds himself watching the dark far more carefully than before.

——

They return to Baker Street just past midnight. The city has quieted, but Arabella’s mind hasn’t. The image of the mauled cat still clings to her, raw and unsettling. She folds her arms around herself, fingers gripping her sleeves as if that might steady her.

She stops near Mrs. Hudson’s door, leaning back against the cool brick. Sherlock finishes locking the front door, the click of the bolt loud in the stillness, before turning to her. There’s a pause, brief, but telling and when he looks at her, concern has slipped through his usual composure.

“Are you all right?” he asks, his voice lower now.

He steps closer without seeming to realise he’s done it, until there’s barely any space left between them. His presence fills her vision, tall and solid, and she catches the faint scent of tobacco on his breath. It’s grounding in an odd way, even as her heart continues to race. 

Sherlock hesitates for a second before reaching for her, as though his body has moved ahead of his reason. His fingers lift her chin, rough pads brushing her skin. The contact startling in its intensity, like touching an exposed nerve. Arabella inhales sharply, and before she quite realises it, her own hand rises in the dim hallway.

Her fingers trace the line of his jaw, lingering where she knows they shouldn’t. She feels the faint rasp of stubble beneath her touch, then her fingertip drifts lower, grazing his bottom lip. A single, reckless point of contact that sends a jolt through them both.

For one dangerous second, Sherlock allows it.

Then the streetlight outside flares through the narrow glass panel in the door, brief but merciless. The ring on her finger flashes, facet cut diamonds catching the light.

Guilt hits him hard and sudden.

He closes his hand around her wrist, not harshly, but decisively, guiding it away from his face. The warmth between them breaks, leaving cold space where there had been none. Sherlock draws a breath, steadying himself, already searching for words that might undo what nearly happened.

The door beside them creaks open.

They spring apart.

Mrs. Hudson peers out, her gaze flicking between them, lingering just long enough to notice what they have failed to hide. “Mr. Holmes,” she says, startled, “you have a lady guest?”

Sherlock straightens at once, the familiar composure snapping back into place even as his pulse betrays him. “Mrs. Hudson,” he replies evenly, “this is Miss Bellamy. She is engaged to my brother, Mycroft. I am merely seeing to her safety while he attends to matters concerning her estate.”

Arabella lowers her hand slowly, her fingers curling in on themselves, the ghost of his touch still there.

Mrs. Hudson steps back, giving a small, almost imperceptible nod, but her eyes linger on Arabella for a moment too long. “Very well,” she murmurs, “just… don’t get yourselves into any trouble, both of you.” She disappears back into her rooms, the door clicking softly behind her.

Arabella exhales slowly, letting her shoulder drop from the taut line it had held, though her fingers still burns from where they’d brushed him. She glances at Sherlock, who leans against the wall opposite, hands tucked into his coat pockets, jaw tight. His usual composure is intact. But only just.

Before either of them can speak, Mrs. Hudson reappears, holding a small, square parcel wrapped in brown paper and tied with coarse string. “Mr. Holmes,” she says, placing it gently into his hands, “this came for you from Scotland Yard this morning.”

Sherlock takes the parcel, one eyebrow rising as his fingers trace the rough twine. “Thank you, Mrs. Hudson,” he murmurs, still conscious of Arabella’s presence beside him. 

He clutches the parcel a little tighter than necessary, fingers pressing into the rough brown paper as his breath slowly evens out. “Goodnight, Mrs. Hudson,” he calls over his shoulder, voice calm but carrying the faintest edge of distraction. “If I stay up late, I’ll try to keep it… quiet.”

With that, he turns and begins up the stairs, each step deliberate, the weight of the parcel tucked under his arm. Arabella follows cautiously, matching his pace, her eyes flicking between him and Mrs. Hudson at the bottom of the stairwell.