It was then that the ultimate horror, the beginning madness, came upon me. Amid my crawling revulsion, my nausea-prompted desire to flee from that seething cavern-mouth, there rose an abhorrently conflicting impulse to return; to thread my backward way through all the catacombs, as the others had done; to go down where never men save they, the inconceivably doomed and accursed, had ever gone; to seek beneath that damnable compulsion a nether world that human thought can never picture. There was a black light, a soundless calling, in the vaults of my brain: the implanted summons of the Thing, like a permeating and sorcerous poison. It lured me to the subterranean door that was walled up by the dying people of Yoh-Vombis, to immure those hellish and immortal leeches, those dark parasites that engraft their own abominable life on the half-eaten brains of the dead. It called me to the depths beyond, where dwell the noisome, necromantic Ones, of whom the leeches, with all their powers of vampirism and diabolism, are but the merest minions . . . .

It was only the two Aihais who prevented me from going back. I struggled, I fought them insanely as they strove to retard me with their spongy arms; but I must have been pretty thoroughly exhausted from all the superhuman adventures of the day; and I went down once more, after a little, into fathomless nothingness, from which I floated out at long intervals, to realize that I was being carried across the desert toward Ignarh.

Well, that is all my story. I have tried to tell it fully and coherently, at a cost that would be unimaginable to the sane . . . to tell it before the madness falls upon me again, as it will very soon—as it is doing now . . . Yes, I have told my story . . . and you have written it all out, haven't you? Now I must go back to Yoh-Vombis—back across the desert and down through all the catacombs to the vaster vaults beneath. Something is in my brain, that commands me and will direct me . . . I tell you, I must go . . .