The 221B Daily

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Thursday, 4 June 2026 | Difficulty IV

The Case of the Locked Rose-Garden

A head gardener is found dead in his locked rose-garden at dawn. His medical bag is open. A vial is missing. The garden gate is bolted from inside.

Engraved key object plate for The Case of the Locked Rose-Garden.
Narrated by Dr Watson — the case as it stood before us
Victorian newspaper-style illustration for The Case of the Locked Rose-Garden, set at The walled rose-garden at Marlow Hall, Berkshire.

Section I

The Scene

Hand-drawn case map for The Case of the Locked Rose-Garden, showing The walled rose-garden at Marlow Hall, Berkshire.
The ground in question.
Setting
The walled rose-garden at Marlow Hall, Berkshire
Time
Thursday morning, third week of July 1894
Weather
A heavy summer dawn lifting; the dew not yet off the grass
Atmosphere
Walls of warm brick crowned with broken glass; rows of dark-red and pale-pink roses; the iron gate cool to the touch and bolted from within.

Section II

The Suspects

  • Sir Hugo Trant

    Master of Marlow Hall, the client

    A grave, soft-spoken gentleman of fifty-five, who had owned the estate twelve years. He had little visible motive: the gardener's quiet land-rights upon a half-acre orchard adjoining the home farm would have come to the estate by clause in two years' time, with Mr Bayle's retirement.

  • Mr Tarn

    Under-gardener, three years' service

    A nervous boy of twenty, who had found the body and could not give a clear account of his movements between four and five o'clock that morning. He had reason to dread suspicion: he had been gathered up by a Maidenhead constable two months before for a public-house brawl.

  • Mr Roe

    Apothecary in the village

    A spare, white-bearded chemist, who had dispensed to Mr Bayle the previous Friday a small quantity of a strong cardiac compound — at the gardener's own request, and for, he had said, his old condition.

  • Mr Bayle

    The gardener's estranged son, arrived from London two days before

    A thin, sharp-mannered young man of twenty-eight, who had returned from a long absence with little affection and a small ambition: a share of his father's modest savings. He had quarrelled with his father at supper on the Tuesday and slept in the home-farm cottage.

Section III

The Evidence

  1. The bolted gate

    The rose-garden's iron gate was found, by the under-gardener, bolted from within. The bolt was of solid brass, run home at full length; no wire, twine, or improvised mechanism could have set it from outside. The gardener's left thumbprint, in dirt from his own bedding-out work of the previous evening, was visible upon the inner face of the bolt-handle.

  2. Mr Tarn's missing hour

    The under-gardener could not account for his whereabouts between four and five that morning beyond saying he had walked across the home-farm. He had no witness; he was visibly agitated.

  3. The empty vial-row

    The medical bag, found open at the body, contained eight small chemist's vials of cardiac compound — Mr Roe's dispensing, dated the Friday — and a ninth space, empty, where a vial had stood. No vial was upon the body or in the gravel of the walk.

  4. The son's bedside-watch

    On the night-stand of the home-farm cottage where the gardener's son had slept, a folded letter from his father, dated three months before, hoping for the son's return and offering him a year's wages to read for an articled clerk's place.

  5. Sir Hugo's pocket

    When Holmes asked, with quiet courtesy, what Sir Hugo carried with him that morning, Sir Hugo set out upon the gravel his cigar-case, his pocket-knife, his pocket-book, and a small unlabelled vial of dark glass — which he confessed he had found upon the gardener and had set, upon impulse, into his own coat.

Section IV

Statements & Testimony

  • Mr Tarn Partial

    Under-gardener

    “"I came up to the rose-garden at five, sir, as ever. The gate was bolted; I called and got no answer; I climbed the gardener's ladder from the kitchen-yard and looked over and saw him there. I went round to the house. I — I cannot say where I was at four, only that I was walking. I had been a fool the night before with two pints, and I was clearing my head."”

  • Mr Roe Reliable

    Village apothecary

    “"Mr Bayle had a heart, sir, this many a year. I dispensed him the cardiac compound on Friday afternoon, three drachms in nine vials, against the old trouble. He was particular as to dose. He took two from the box on Friday night and a third on Tuesday — he sent the boy down to renew. He should not have died of his trouble: he would have known the warning."”

Section V

Your Verdict

Three picks render a verdict. Name the culprit, choose the method, and nail the keystone clue. We score all three — partial credit if you got the culprit but missed the method, full credit only if you got Holmes’s exact reasoning.

1. Name the culprit
2. Choose the method

Which of these accounts of the deed best matches the evidence?

3. Pick the keystone clue

Of all the evidence above, which single piece nails the case?

Choose a culprit, a method, and a keystone clue to render your verdict.