had found its match in Holmes and his “science of deduction,” which could wrest an astonishing solution from a single, seemingly unremarkable clue. “All life is a great chain, the nature of which is known whenever we are shown a single link of it,” Holmes explains in the first story, “A Study in Scarlet,” which establishes a narrative formula that subsequent tales nearly always follow. A new client arrives at Holmes’s Baker Street consulting room. The detective stuns the visitor by deducing some element of his life by the mere observation of his demeanor or dress. (In “A Case of Identity,” he divines that his client is a shortsighted typist by no more than the worn “plush upon her sleeves” and “the dint of a pince-nez at either side of her nose.”) After the client presents the inexplicable facts of the case, “the game is afoot,” as Holmes likes to say. Amassing clues that invariably boggle Watson, the stories’ more earthbound narrator, Holmes ultimately arrives at a dazzling conclusion—one that, to him and him only, seems “elementary.” In “The Red-Headed League,” Holmes reveals to Watson how he surmised that an assistant pawnbroker was trying to rob a bank by tunnelling underneath it. “I thought of the assistant’s fondness for photography, and his trick of vanishing into the cellar,” Holmes says, explaining that he then went to see the assistant. “I hardly looked at his face. His knees were what I wished to see. You must yourself have remarked how worn, wrinkled and stained they were. They spoke of those hours of burrowing. The only remaining point was what they were burrowing for. I walkedround the corner, saw the City and Suburban Bank abutted on our friend’s premises, and felt that I had solved my problem.”
Following the advice that Holmes often gave to Watson, Green practiced how to “see” what others merely “observed.” He memorized Holmes’s rules, as if they were catechism: “It is a capital mistake to theorize before one has data”; “never trust to general impressions, my boy, but concentrate yourself upon details”; “there is nothing more deceptive than an obvious fact.”
Not long after Green turned thirteen, he carried an assortment of artifacts from local junk sales into the dimly lit attic of Poulton Hall. Part of the attic was known as the Martyr’s Chamber and was believed to be haunted, having once “been tenanted by a lady, who was imprisoned there and persecuted to death for her religion,” according to Hawthorne. Nevertheless, up in the attic, Green assembled his objects to create a strange tableau. There was a rack of pipes and a Persian slipper stuffed with tobacco. There was a stack of unpaid bills, which he stabbed into a mantel with a knife, so that they were pinned in place. There was a box of pills labelled “Poison”; empty ammunition cartridges and trompe-l’œil bullet marks painted on the walls (“I didn’t think the attic would stand up to real bullets,” he later remarked); a preserved snake; a brass microscope; and an invitation to the Gasfitters’ Ball. Finally, outside the door of the room, Green hung a sign: “Baker Street.”
Relying on the stray details sprinkled throughout Conan Doyle’s stories, Green had pieced together a replica of Holmes and Watson’s apartment—one so precise that it occasionally drew Holmes aficionados from other parts of England. One local reporter described the uncanny sensation of climbing the seventeen stairs—the same number specified in the stories—as a tape recording played in the background with the sounds of Victorian London: the rumble of cab wheels, the clopping of horses’ hooves on cobblestones. By then, Green had become theyoungest person ever inducted into the Sherlock Holmes Society of London, where members sometimes dressed in period costumes—in high-waisted trousers and top hats.
Though Holmes had first appeared in print nearly a century earlier, he had