This gave me at once the necessary strength, and in a second I had swung myself on to a beam, crying aloud with all the authority I could put into my voice—
"You fool, man! What in the world are you trying to do? Come down at once!"
My energetic actions and words combined had an immediate effect upon him for which I blessed Heaven; for he looked up from his horrid task, stared hard at me for a second or two, and then came wriggling along like a great cat to intercept me. He came by a series of leaps and bounds and at an astonishing pace, and the way he moved somehow inspired me with a fresh horror, for it did not seem the natural movement of a human being at all, but more, as I have said, like that of some lithe wild animal.
He was close upon me. I had no clear idea of what exactly I meant to do. I could see his face plainly now; he was grinning cruelly; the eyes were positively luminous, and the menacing expression of the mouth was most distressing to look upon. Otherwise it was the face of a chalk man, white and dead, with all the semblance of the living human drawn out of it. Between his teeth he held my clasp knife, which he must have taken from me in my sleep, and with a flash I recalled his anxiety to know exactly which pocket it was in.
"Drop that knife!" I shouted at him, "and drop after it yourself—"
"Don't you dare to stop me!" he hissed, the breath coming between his lips across the knife that he held in his teeth. "Nothing in the world can stop me now—I have promised—and I must do it. I can't hold out any longer."
"Then drop the knife and I'll help you," I shouted back in his face. "I promise—"
"No use," he cried, laughing a little, "I must do it and you can't stop me."
I heard a sound of laughter, too, somewhere in the air behind me. The next second Shorthouse came at me with a single bound.
To this day I cannot quite tell how it happened. It is still a wild confusion and a fever of horror in my mind, but from somewhere I drew more than my usual allowance of strength, and before he could well have realised what I meant to do, I had his throat between my fingers. He opened his teeth and the knife dropped at once, for I gave him a squeeze he need never forget. Before, my muscles had felt like so much soaked paper; now they recovered their natural strength, and more besides. I managed to work ourselves along the rafter until the hay was beneath us, and then, completely exhausted, I let go my hold and we swung round together and dropped on to the hay, he clawing at me in the air even as we fell.