“Is there not one alternative,” I suggested, “grotesquely improbable, no doubt, but still just conceivable? Might the whole story of the cataleptic Russian and his son be a concoction of Dr. Trevelyan’s, who has, for his own purposes, been in Blessington’s rooms?”

I saw in the gaslight that Holmes wore an amused smile at this brilliant departure of mine.

“My dear fellow,” said he, “it was one of the first solutions which occurred to me, but I was soon able to corroborate the doctor’s tale. This young man has left prints upon the stair-carpet which made it quite superfluous for me to ask to see those which he had made in the room. When I tell you that his shoes were square-toed instead of being pointed like Blessington’s, and were quite an inch and a third longer than the doctor’s, you will acknowledge that there can be no doubt as to his individuality. But we may sleep on it now, for I shall be surprised if we do not hear something further from Brook Street in the morning.”