“And then?”

“Then Nancy fainted, and I caught up the key of the door from her hand, intending to unlock it and get help. But as I was doing it it seemed to me better to leave it alone and get away, for the thing might look black against me, and anyway my secret would be out if I were taken. In my haste I thrust the key into my pocket, and dropped my stick while I was chasing Teddy, who had run up the curtain. When I got him into his box, from which he had slipped, I was off as fast as I could run.”

“Who’s Teddy?” asked Holmes.

The man leaned over and pulled up the front of a kind of hutch in the corner. In an instant out there slipped a beautiful reddish-brown creature, thin and lithe, with the legs of a stoat, a long, thin nose, and a pair of the finest red eyes that ever I saw in an animal’s head.

“It’s a mongoose,” I cried.