Strange to say, at that very time something was occurring that seemed to lend confirmation to the doctor's views of Halima's disposition. Soon after her father's death, she had chosen to consider herself slighted through the non-observance by a neighboring tribe of some trivial ceremony customary on the decease of a friendly Sheik; and St. Just had been surprised at the importance she had assigned to it and the temper she had shown. Since then, she had been continually urging him to invade their territory to chastise them. But he was unwilling to break the peace of the district, that had been so admirably kept by the old Sheik; and had, so far, held her back.

With a view of diverting her attention from the subject, he proposed that they should set about the recovery of the buried treasure; to his delight, she at once acceded to his suggestion. So he called together some of the elder members of the tribe—those with whom the old Sheik had been in the habit of taking counsel—and told them what he and Halima had resolved.

Accordingly, a party was formed, which, beside St. Just and Halima, consisted of six of the leading members of the tribe, Abdallah, Mahmoud and a guard of forty-five men.

St. Just had been surprised when Halima had announced her intention of accompanying the expedition, and had done his utmost to dissuade her; but she had been resolute to go, and, of course, had had her way.

So, early one morning, they set out. It was now three weeks since the old Sheik's death.

They traveled with all speed, but, for all that, it was nightfall when they reached the rocks that marked the entrance to the subterranean city. To explore it at that time could not be thought of, for all were more or less fatigued; so St. Just gave orders for the camels to be tethered and for the men to make themselves as comfortable as circumstances would permit, an impromptu tent being rigged up for Halima. Then fires were lighted, and a meal of stewed kid, supplemented with dates and rice, was prepared and duly eaten. This done, a watch was set, and the men disposed themselves to pass the night, each rolled up in his blanket. St. Just, before he retired to rest, walked through the camp, to see that all were settled and to give his last instructions to the sentry. Then he himself lay down just outside Halima's tent.

But, tired though he was, he could not sleep; his brain was busy with thoughts of the treasure the morrow would disclose—of what it would consist, its value, and all that it might lead to. He tried to put the thoughts away from him, for he longed to sleep; but, the more he tried, the more wakeful he became, and he tossed about from side to side, in the vain hope that, by changing his position, he would effect his purpose.

Presently the sound of a light footfall reached his ear, then some one behind him touched his arm. He started up and laid his hand upon his dagger, believing himself about to be attacked. Halima stood beside.

"You startled me, sweetheart," he exclaimed in muffled tones. "Is anything the matter; are you ill?"

"Hush! no," was her reply, and she put a finger to her lips, "but I want to talk to you, undisturbed. Everyone is now asleep."