Standing on the top step of the broad stone stair, they looked directly across the broad chamber, with its dust-covered heavy tile floor and bare black stone walls. From about the center of the chamber, massive steps led up to a stone dais, and on this dais stood a marble throne. About this throne glowed and shimmered an uncanny light, and the awe-struck adventurers gasped as they saw its source. On the throne slumped a human skeleton, an almost shapeless mass of moldering bones. A fleshless hand sagged outstretched upon the broad marble throne-arm, and in its grisly clasp there pulsed and throbbed like a living thing, a great crimson stone.

The Fire of Asshurbanipal! Even after they had found the lost city Steve had not really allowed himself to believe that they would find the gem, or that it even existed in reality. Yet he could not doubt the evidence of his eyes, dazzled by that evil, incredible glow. With a fierce shout he sprang across the chamber and up the steps. Yar Ali was at his heels, but when Steve would have seized the gem, the Afghan laid a hand on his arm.

"Wait!" exclaimed the big Muhammadan. "Touch it not yet, sahib! A curse lies on ancient things—and surely this is a thing triply accursed! Else why has it lain here untouched in a country of thieves for so many centuries? It is not well to disturb the possessions of the dead."

"Bosh!" snorted the American. "Superstitions! The Bedouins were scared by the tales that have come down to 'em from their ancestors. Being desert-dwellers they mistrust cities anyway, and no doubt this one had an evil reputation in its lifetime. And nobody except Bedouins have seen this place before, except that Turk, who was probably half demented with suffering.

"These bones may be those of the king mentioned in the legend—the dry desert air preserves such things indefinitely—but I doubt it. May be Assyrian—most likely Arab—some beggar that got the gem and then died on that throne for some reason or other."

The Afghan scarcely heard him. He was gazing in fearful fascination at the great stone, as a hypnotized bird stares into a serpent's eye.

"Look at it, sahib!" he whispered. "What is it? No such gem as this was ever cut by mortal hands! Look how it throbs and pulses like the heart of a cobra!"

Steve was looking, and he was aware of a strange undefined feeling of uneasiness. Well versed in the knowledge of precious stones, he had never seen a stone like this. At first glance he had supposed it to be a monster ruby, as told in the legends. Now he was not sure, and he had a nervous feeling that Yar Ali was right, that this was no natural, normal gem. He could not classify the style in which it was cut, and such was the power of its lurid radiance that he found it difficult to gaze at it closely for any length of time. The whole setting was not one calculated to soothe restless nerves. The deep dust on the floor suggested an unwholesome antiquity; the gray light evoked a sense of unreality, and the heavy black walls towered grimly, hinting at hidden things.

"Let's take the stone and go!" muttered Steve, an unaccustomed panicky dread rising in his bosom.

"Wait!" Yar Ali's eyes were blazing, and he gazed, not at the gem, but at the sullen stone walls. "We are flies in the lair of the spider! Sahib, as Allah lives, it is more than the ghosts of old fears that lurk over this city of horror! I feel the presence of peril, as I have felt it before—as I felt it in a jungle cavern where a python lurked unseen in the darkness—as I felt it in the temple of Thuggee where the hidden stranglers of Siva crouched to spring upon us—as I feel it now, tenfold!"