Then the mental cataclysm came. It was horrible—hideous beyond all articulate description because it was all of the soul, with nothing of detail to describe. It was the ecstasy of nightmare and the summation of the fiendish. The suddenness of it was apocalyptic and daemoniac—one moment I was plunging agonizedly down that narrow well of million-toothed torture, yet the next moment I was soaring on bat-wings in the gulfs of hell; swinging free and swoopingly through illimitable miles of boundless, musty space; rising dizzily to measureless pinnacles of chilling ether, then diving gaspingly to sucking nadirs of ravenous, nauseous lower vacua. . . . Thank God for the mercy that shut out in oblivion those clawing Furies of consciousness which half-unhinged my faculties, and tore Harpy-like at my spirit! That one respite, short as it was, gave me the strength and sanity to endure those still greater sublimations of cosmic panic that lurked and gibbered on the road ahead.