He unwound the handkerchief and held out his hand. It gave even my hardened nerves a shudder to look at it. There were four protruding fingers and a horrid red, spongy surface where the thumb should have been. It had been hacked or torn right out from the roots.

“Good heavens!” I cried, “this is a terrible injury. It must have bled considerably.”

“Yes, it did. I fainted when it was done, and I think that I must have been senseless for a long time. When I came to I found that it was still bleeding, so I tied one end of my handkerchief very tightly round the wrist and braced it up with a twig.”

“Excellent! You should have been a surgeon.”

“It is a question of hydraulics, you see, and came within my own province.”

“This has been done,” said I, examining the wound, “by a very heavy and sharp instrument.”

“A thing like a cleaver,” said he.

“An accident, I presume?”

“By no means.”

“What! a murderous attack?”

“Very murderous indeed.”

“You horrify me.”

I sponged the wound, cleaned it, dressed it, and finally covered it over with cotton wadding and carbolised bandages. He lay back without wincing, though he bit his lip from time to time.

“How is that?” I asked when I had finished.