I nodded. I knew something of the old hermit-like man who had lived in his great dark house on the hill; indeed, I had once witnessed one of his strange seizures, and I had been appalled at the writhings, howlings and yammerings of the wretch, who had groveled on the earth like a wounded snake, gibbering terrible curses and black blasphemies until his voice broke in a wordless screaming which spattered his lips with foam. Seeing this, I understood why people in old times looked on such victims as men possessed by demons.