The dawn of New Year’s Eve brought no respite from the bitter, relentless frost. As the Northbound Express rattled out of Euston Station, the windowpanes of our first-class carriage were already obscured by thick, crystalline ferns of ice. London, with its sulfurous fogs and sprawling brick labyrinths, was rapidly left behind, replaced by the bleak, white-mantled expanse of the English midlands.
Holmes sat opposite me, enveloped in his heavy traveling cloak, his piercing eyes fixed upon a small, intricate mechanism he held in his gloved fingers. It was a delicate brass gear-tooth, retrieved from the ransacked workshop in Brixton.
"You see, Watson," he remarked, his voice cutting through the rhythmic clatter of the tracks, "the East End gasworks were merely the laboratory where the stolen rubies were to be altered. The true architecture of this conspiracy remains largely unexplored. We have intercepted the hand that turned the key, and the brain that financed the theft from the Countess’s drawing-room."
"You speak of Catherine Cusack and Major Sholto’s cousin," I said, adjusting the collar of my woollen coat.
"Precisely," Holmes replied. "But consider the original anomaly. The Blue Carbuncle—the very crown of the Countess of Morcar’s collection—was found in the crop of a Christmas goose. It was a crime born of panicked opportunity. Yet, this second attempt, involving the companion stones of the Mogok suite, was orchestrated with military precision."
He leaned forward, tapping the brass gear against the wooden armrest. "The architectural blueprints of the Surrey safes were annotated in an engineer’s medium. The tools left behind in Brixton were not the crude instruments of London housebreakers, but the specialized apparatus of a master watchmaker. Our anonymous informant in Wapping warned us that the Countess's house was bleeding from within."
"And you believe the engineer is not in London?"
"The brass alloy of this gear-tooth contains a unique percentage of nickel, characteristic of the great railway foundries of Crewe," Holmes said, his eyes flashing with sudden animation. "Furthermore, a telegram arrived at Baker Street an hour before our departure, dispatched from the snow-bound village of Nether End in Derbyshire. The Countess of Morcar has fled there to seek solace with her estranged sister, Lady Cynthia. But the shadow follows her, Watson. We must reach the Derbyshire peaks before the year expires."
