Mechanism Cipher
Corporal Rattle’s Drum

Corporal Rattle, the drummer soldier, stands beside the workshop door. A pinned barrel inside his drum remembers everything the door does, and plays it back as taps and rolls when you wind him.
A free evening from The Clockwork Witnesses
The night before it is delivered to the Lady Mayoress, Master Sprue’s golden lark vanishes from his workbench. Nobody human saw it go. His automatons saw everything, and they cannot stop repeating it.
The evening and its puzzles are new, made for this page in the style of the book, and nothing in them spoils it. Play on screen, or print them and grab a pencil.


A winter before the book begins
You are the apprentice at Sprue’s House of Automata, No. 9 Crookspire Lane, in Sorrowby-on-the-Wane. All week Master Sprue has worked on a golden lark for the Lady Mayoress, and tonight it sat finished on the workbench, wound and gleaming, to be collected at nine tomorrow.
At ten o’clock Sprue wound every witness in the workshop, as he does each night. At half past ten he went up to the Parlor with the Lady Mayoress’s secretary to sign the papers. At eleven he came down, and the velvet box on the bench was empty.
“Don’t ask the people,” he says, screwing his loupe into his eye. “People tell you what they wish had happened. Ask the toys.”
Also in the house: Mrs. Pim, the housekeeper, who keeps the kitchen and every key in it, and Jonas Flint, the lamplighter, who stopped in the yard for a pipe. Neither is a suspect: Mrs. Pim was never out of sight of her kettle, and Jonas Flint cannot tell a lark from a kettle.
Mechanism Cipher

Corporal Rattle, the drummer soldier, stands beside the workshop door. A pinned barrel inside his drum remembers everything the door does, and plays it back as taps and rolls when you wind him.
Gear Train

The drum roll does not say when. But Rattle’s barrel is driven from his escape wheel, and the pin for the door sits a measured way round it. Master Sprue wound him, barrel at zero, at ten o’clock.
Master Sprue’s notes on Rattle’s works
Logic Grid

At half past ten Master Sprue left the lark on the workbench and went up to the Parlor. At a quarter to eleven each of his four visitors was in a different room, and each had different company, or none. Mrs. Pim, who sees everything that happens in her kitchen, remembers this:
Mirror & Transposition

Mr. Blot, the scribe, writes down every word spoken in the workshop, in mirror writing. At a quarter to eleven he wrote one line, very small. Somebody had been whispering.
Mr. Blot’s page, three lines in mirror writing
Write the whisper here, letter by letter (69 letters):
Wound Backwards

Master Sprue’s four chatterbox toys sit on the shelf above the bench and repeat what they saw. But somebody brushed against them in the dark, and some were wound backwards.
Puzzle-Box Lock

Miss Warble’s key card lives in Master Sprue’s spare-parts drawer, behind a lock of four brass dials. Sprue forgets the code every winter. Scratched inside the lid are his last attempts, with what the lock answered.
Scratched inside the lid
Your dials (tap a dial to turn it)
Keep this word: the last puzzle needs it.
Mechanism Cipher

Miss Warble, the songbird, pins every sound she hears onto the brass cylinder under her perch. After eleven she heard a little song, muffled, from somewhere beyond the workshop door, and she answered it, as songbirds do.
Miss Warble’s cylinder, after eleven: low pin over high pin
Close the evening

Master Sprue sits at the bench, his loupe in his eye and Mr. Tock’s silver salver at his elbow. “Well?” he says. “What do my witnesses say?” Here is every line of testimony you have heard.
The question. Who took the golden lark, and where is it now?

Just before midnight. Mrs. Quaver does not deny it. “It sang Her Ladyship’s song a semitone flat,” she says, “and I could not let it leave the house like that.” Master Sprue winds the lark on the bench, and it sings the song true from the first note to the last. “Machines are honest,” he says. “Teachers, it seems, are thorough.” At nine in the morning Miss Gaunt carries the lark away in its velvet box, and Mrs. Quaver is engaged to tune every bird in the house.
Owlbrook Grim Tales · Book Three
The toymaker is dead. His clockwork dolls saw everything. They just can’t stop repeating it.
That was one quiet evening at the House of Automata. In the book, Master Sprue is found dead at his bench on the night of his seventieth birthday, the door bolted from inside, and the Inspector arrests the housekeeper before breakfast. Over eight days you question eight automaton witnesses, one a day, each through a chain of five puzzles that ends in its Testimony, and then you face the inquest. Ten kinds of puzzle: mechanism ciphers, gear trains, mirror writing, sightline floor plans, logic grids, puzzle-box locks, blueprint nonograms, toys wound backwards, alibi timelines and word searches. 45 puzzles, rising from medium to fiendish, every one checked by computer to have exactly one solution, with a hint and an answer check for each and full solutions.
More gothic mysteries in Owlbrook Grim Tales.
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