“I thought so. A very delicate blade devised for very delicate work. A strange thing for a man to carry with him upon a rough expedition, especially as it would not shut in his pocket.”

“The tip was guarded by a disk of cork which we found beside his body,” said the Inspector. “His wife tells us that the knife had lain upon the dressing-table, and that he had picked it up as he left the room. It was a poor weapon, but perhaps the best that he could lay his hands on at the moment.”

“Very possible. How about these papers?”

“Three of them are receipted hay-dealers’ accounts. One of them is a letter of instructions from Colonel Ross. This other is a milliner’s account for thirty-seven pounds fifteen made out by Madame Lesurier, of Bond Street, to William Derbyshire. Mrs. Straker tells us that Derbyshire was a friend of her husband’s and that occasionally his letters were addressed here.”