The darkness closed around me as I advanced, until I was moving in utter blackness. My groping left hand encountered a strangely carven doorway, and at that instant something hissed like a viper beside me and slashed fiercely at my thigh. I struck back savagely and felt my blind stroke crunch home, and something fell at my feet and died. What thing I had slain in the dark I could not know, but it must have been at least partly human because the shallow gash in my thigh had been made with a blade of some sort, and not by fangs or talons. And I sweated with horror, for the gods know, the hissing voice of the Thing had resembled no human tongue I had ever heard.