I was afraid to go back into that subterranean passage by day, but I forced myself to do so one day, just the same. I went down with my flashlight, and I examined the floor of that tunnel with care. Wherever the earth was soft, I saw the marks of many feet, passing back and forth. Most of them were human footprints, but there were disquieting others—naked feet with blurred toes, as if they were webbed! I confess I turned the light away from them, shuddering.