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!"

Steve's hair prickled. He knew that Yar Ali was a grim veteran, not to be stampeded by silly fear or senseless panic; he well remembered the incidents referred to by the Afghan, as he remembered other occasions upon which Yar Ali's Oriental telepathic instinct had warned him of danger before that danger was seen or heard.

"What is it, Yar Ali?" he whispered.

The Afghan shook his head, his eyes filled with a weird mysterious light as he listened to the dim occult promptings of his subconsciousness.

"I know not; I know it is close to us, and that it is very ancient and very evil. I think----" Suddenly he halted and wheeled, the eery light vanishing from his eyes to be replaced by a glare of wolf-like fear and suspicion.

"Hark, _sahib_!" he snapped. "Ghosts or dead men mount the stair!"

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