Suddenly the monster vanished. It had toppled over the brim of the cylinder and fallen into the pit, with a thud like the fall of a great mass of leather. I heard it give a peculiar thick cry, and forthwith another of these creatures appeared darkly in the deep shadow of the aperture.

I turned and, running madly, made for the first group of trees, perhaps a hundred yards away; but I ran slantingly and stumbling, for I could not avert my face from these things.