"I've looted enough from the Khitan caravans to know what I'm talking about," he asserted. "That's jade!"

The vaulted ceiling was of lapis lazuli, adorned with clusters of great green stones that gleamed with a poisonous radiance.

"Green fire-stones," growled Conan. "That's what the people of Punt call them. They're supposed to be the petrified eyes of those prehistoric snakes the ancients called Golden Serpents. They glow like a cat's eyes in the dark. At night this hall would be lighted by them, but it would be a hellishly weird illumination. Let's look around. We might find a cache of jewels."

"Shut the door," advised Valeria. "I'd hate to have to outrun a dragon down this hall."

Conan grinned, and replied: "I don't believe the dragons ever leave the forest."

But he complied, and pointed out the broken bolt on the inner side.

"I thought I heard something snap when I shoved against it. That bolt's freshly broken. Rust has eaten nearly through it. If the people ran away, why should it have been bolted on the inside?"

"They undoubtedly left by another door," suggested Valeria.

She wondered how many centuries had passed since the light of outer day had filtered into that great hall through the open door. Sunlight was finding its way somehow into the hall, and they quickly saw the source. High up in the vaulted ceiling skylights were set in slot-like openings—translucent sheets of some crystalline substance. In the splotches of shadow between them, the green jewels winked like the eyes of angry cats. Beneath their feet the dully lurid floor smoldered with changing hues and colors of flame. It was like treading the floors of Hell with evil stars blinking overhead.

Three balustraded galleries ran along on each side of the hall, one above the other.

"A four-storied house," grunted Conan, "and this hall extends to the roof. It's long as a street. I seem to see a door at the other end."

Valeria shrugged her white shoulders.

"Your eyes are better than mine, then, though I'm accounted sharp-eyed among the sea-rovers."

They turned into an open door at random, and traveresed a series of empty chambers, floored like the hall, and with walls of the same green jade, or of marble or ivory or chalcedony, adorned with friezes of bronze, gold, or silver. In the ceilings the green fire-gems were set, and their light was as ghostly and illusive as Conan had predicted. Under the witch-fire glow the intruders moved like specters.

Some of the chambers lacked this illumination, and their doorways showed black as the mouth of the Pit. These Conan and Valeria avoided, keeping always to the lighted chambers.

Cobwebs hung in the corners, but there was no perceptible accumulation of dust on the floor, or on the tables and seats of marble, jade, or carnelian which occupied the chambers. Here and there were rugs of that silk known as Khitan which is practically indestructible. Nowhere did they find any windows, or doors opening into streets or courts. Each door merely opened into another chamber or hall.

"Why don't we come to a street?" grumbled Valeria. "This palace or whatever we're in must be as big as the king of Turan's seraglio."

"They must not have perished of plague," sad Conan, meditating upon the mystery of the empty city. "Otherwise we'd find skeletons. Maybe it became haunted, and everybody got up and left. Maybe—"

"Maybe, hell!" broke in Valeria rudely. "We'll never know. Look at these friezes. They portray men. What race do they belong to?"

Conan scanned them and shook his head.

"I never saw people exactly like them. But there's the smack of the East about them—Vendhya, maybe, or Kosala."

"Were you a king in Kosala?" she asked, masking her keen curiosity with derision.

"No. But I was a war chief of the Afghulis who live in the Himelian mountains above the borders of Vendhya. These people favor the Kosalans. But why should Kosalans be building a city this far to the west?"

The figures portrayed were those of slender, olive-skinned men and women, with finely chiseled, exotic features. They wore filmy robes and many delicate jeweled ornaments, and were depicted mostly in attitudes of feasting, dancing, or lovemaking.

"Easterners, all right," grunted Conan, "but from where I don't know. They must have lived a disgustingly peaceful life, though, or they'd have scenes of wars and fights. Let's go up those stairs."

It was an ivory spiral that wound up from the chamber in which they were standing. They mounted three flights and came into a broad chamber on the fourth floor, which seemed to be the highest tier in the building. Skylights in the ceiling illuminated the room, in which light the fire-gems winked pallidly. Glancing through the doors they saw, except on one side, a seies of similarly lighted chambers. This other door opened upon a balustraded gallery that overhung a hall much smaller than the one they had recently explored on the lower floor.

"Hell!" Valeria sat down disgustedly on a jade bench. "The people who deserted this city must have taken all their treasures with them. I'm tired of wandering through these bare rooms at random."

"All these upper chambers seem to be lighted," said Conan. "I wish we could find a window that overlooked the city. Let's have a look through that door over there."

"You have a look," advised Valeria. "I'm going to sit here and rest my feet."

Conan disappeared through the door opposite that one opening upon the gallery, and Valeria leaned back with her hands clasped behind her head, and thrust her booted legs out in front of her. These silent rooms and halls with their gleaming green clusters of ornaments and burning crimson floors were beginning to depress her. She wished they could find their way out of the maze into which they had wandered and emerge into a street. She wondered idly what furtive, dark feet had glided over those flaming floors in past centuries, how many deeds of cruelty and mystery those wrinking ceiling-gems had blazed down upon.

It was a faint noise that brought her out of her reflections. She was on her feet with her sword in her hand before she realized what had disturbed her. Conan had not returned, and she knew it was not he that she had heard.

The sound had come from somewhere beyond the door that opened on to the gallery. Soundlessly in her soft leather boots she glided through it, crept across the balcony and peered down between the heavy balustrades.

A man was stealing along the hall.

The sight of a human being in this supposedly deserted city was a startling shock. Crouching down behind the stone balusters, with every nerve tingling, Valeria glared down at the stealthy figure.

The man in no way resembled the figures depicted on the friezes. He was slightly above middle height, very dark, though not Negroid. He was naked but for a scanty silk clout that only partly covered his muscular hips, and a leather girdle, a hand's breadth broad, about his lean waist. His long black hair hung in lank strands about his shoulders, giving him a wild appearance. He was gaunt, but knots and cords of muscles stood out on his arms and legs, without that fleshy padding that presents a pleasing symmetry of contour. He was built with an economy that was almost repellent.

Yet it was not so much his physical appearance as his attitude that impressed the woman who watched him. He slunk along, stooped in a semi-crouch, his head turning from side to side. He grasped a wide-tipped blade in his right hand and she saw it shake with the intensity of the emotion that gripped him. He was afraid, trembling in the grip of some dire terror. When he turned his head she caught the blaze of wild eyes among the lank strands of black hair.