The Valley of Fear. A Sherlock Holmes Story. - Sir Arthur Conan Doyle, Arthur I. Keller (illustrator) 1914 - George H. Doran Company, New York - First Edition The fourth and final full-length Sherlock Holmes novel, the true first edition, illustrated with seven colour plates by Arthur Keller, preceding the English edition which was published the following year with a single black and white frontispiece replacing Keller’s seven colour plates.

A retrospective or 'flashback' adventure set in Pennsylvania, 1888. '
The Valley of Fear' is also notable for the involvement of Holmes arch-nemesis Professor Moriarty. The plot is based on the activities of Molly Maguires, an Irish-American activist group known for their violent conflicts and long held status as a secret society.

‘Mr Mac, the most practical thing that you ever did in your life would be to shut yourself up for three months and read twelve hours a day at the annals of crime.’
  References: Green & Gibson, Bibliography of A Conan Doyle, A39c. Cooper & Pike, Detective Fiction 115. Harold Locke, The Writings of Sir Arthur Conan Doyle, 64-65.

Octavo (20.4 x 13.6 cm) pp. 320. In publisher’s red cloth, spine and front board lettered in gilt. Small booksellers plate to front pastedown.
  Condition: Near fine, gilt bright, very little sunning to spine, small spot to lower corner of front board.   Ref: 109106   Price: HK$ 4,600