So Carter began another silent crawl through the ruins, edging slowly toward the great central plaza and the winged lions. It was ticklish work, but the moonbeasts were pleasantly busy and did not hear the slight noises which he twice made by accident among the scattered stones. At last he reached the open space and picked his way among the stunted trees and vines that had grown up therein. The gigantic lions loomed terrible above him in the sickly glow of the phosphorescent night clouds, but he manfully persisted toward them and presently crept round to their faces, knowing it was on that side he would find the mighty darkness which they guard. Ten feet apart crouched the mocking-faced beasts of diorite, brooding on cyclopean pedestals whose sides were chiselled in fearsome bas-reliefs. Betwixt them was a tiled court with a central space which had once been railed with balusters of onyx. Midway in this space a black well opened, and Carter soon saw that he had indeed reached the yawning gulf whose crusted and mouldy stone steps lead down to the crypts of nightmare.