“I should be very glad.” We all filed into the front room and sat round the central table while the Inspector unlocked a square tin box and laid a small heap of things before us. There was a box of vestas, two inches of tallow candle, an A.D.P. brier-root pipe, a pouch of sealskin with half an ounce of long-cut Cavendish, a silver watch with a gold chain, five sovereigns in gold, an aluminum pencil-case, a few papers, and an ivory-handled knife with a very delicate, inflexible blade marked Weiss & Co. , London.

“This is a very singular knife,” said Holmes, lifting it up and examining it minutely. “I presume, as I see bloodstains upon it, that it is the one which was found in the dead man’s grasp. Watson, this knife is surely in your line?”

“It is what we call a cataract knife,” said I.