But Marinus Bicknell Willett was sorry that he looked again; for surgeon and veteran of the dissecting-room though he was, he has not been the same since. It is hard to explain just how a single sight of a tangible object with measurable dimensions could so shake and change a man; and we may only say that there is about certain outlines and entities a power of symbolism and suggestion which acts frightfully on a sensitive thinker's perspective and whispers terrible hints of obscure cosmic relationships and unnameable realities behind the protective illusions of common vision. In that second look Willett saw such an outline or entity, for during the next few instants he was undoubtedly as stark mad as any inmate of Dr. Waite's private hospital. He dropped the electric torch from a hand drained of muscular power or nervous co-ordination, nor heeded the sound of crunching teeth which told of its fate at the bottom of the pit. He screamed and screamed and screamed in a voice whose falsetto panic no acquaintance of his would ever have recognised, and though he could not rise to his feet he crawled and rolled desperately away over the damp pavement where dozens of Tartarean wells poured forth their exhausted whining and yelping to answer his own insane cries. He tore his hands on the rough, loose stones, and many times bruised his head against the frequent pillars, but still he kept on. Then at last he slowly came to himself in the utter blackness and stench, and stopped his ears against the droning wail into which the burst of yelping had subsided. He was drenched with perspiration and without means of producing a light; stricken and unnerved in the abysmal blackness and horror, and crushed with a memory he never could efface. Beneath him dozens of those things still lived, and from one of the shafts the cover was removed. He knew that what he had seen could never climb up the slippery walls, yet shuddered at the thought that some obscure foothold might exist.