The remainder of the procession consisted of fifty tribesmen, fully armed and wearing the colors of the khan. Several heavily laden camels at the end implied that the caravan was setting upon a long journey.

As the Persian came opposite the house of the Americans the physician turned his dark eyes for a moment upon the balcony, and they met those of Allison.

“Good God!” cried the young man, starting back as if in terror. At the same time Janet gave a low moan and sank fainting into Bessie’s arms.

“What is it? What has happened?” asked the girl, in frightened tones. “Aunt Lucy, come and help me! Janet has fainted.”

While they carried her into the room and fussed over her, as women will on such occasions, Allison turned and rushed down into the street. He was not long in overtaking the dromedaries, and, running beside them, he shouted:

“Wait, doctor! Let me speak to you a moment!”

The Persian was bowing in the direction of a balcony on the opposite side of the street, and seemed not to hear the young American. But Allison was desperate.

“Wait—wait!” he cried again, and turned to seize the camel’s bridle.

Then the physician slowly turned his head and gazed curiously down upon the man.

“I must speak with you,” said Allison, tugging at the bridle.