The apparition cried out gurglingly and went down, severed through shoulder, breast-bone and spine, and as it fell the burning skull rolled clear, revealing a lank mop of black hair and a dark face twisted in the convulsions of death. Beneath the horrific masquerade there was a human being, a man similar to the one kneeling supinely on the floor.

The latter looked up at the sound of the blow and the cry, and now he glared in wild-eyed amazement at the white-skinned woman who stood over the corpse with a dripping sword in her hand.

He staggered up, yammering as if the sight had almost unseated his reason. She was amazed to realize that she understood him. He was gibbering in the Stygian tongue, though in a dialect unfamiliar to her.

"Who are you? Whence come you? What do you in Xuchotl?" Then rushing on, without waiting for her to reply: "But you are a friend—goddess or devil, it makes no difference! You have slain the Burning Skull! It was but a man beneath it, after all! We deemed it a demon they conjured up out of the catacombs! Listen!"

He stopped short in his ravings and stiffened, straining his ears with painful intensity. The girl heard nothing.

"We must hasten!" he whispered. "They are west of the Great Hall! They may be all around us here! They may be creeping upon us even now!"

He seized her wrist in a convulsive grasp she found hard to break.

"Whom do you mean by 'they'?" she demanded.

He stared at her uncomprehendingly for an instant, as if he found her ignorance hard to understand.

"They?" he stammered vaguely. "Why—why, the people of Xotalanc! The clan of the man you slew. They who dwell by the eastern gate."