A faint sound caught his ear. He started, clutched his staff, and turned sharply about, thinking that the robbers had seen him and returned. It was only one of the unfortunate soldiers who had been left for dead. He had raised himself upon his elbow, and was trying to attract Kanana's attention.

"Water! water! In the name of Allah, give me water!" he gasped, and fell back unconscious.

For a moment Kanana was tempted to hurry on. He did not want to go there, any more than he wanted to delay his journey; but something whispered to him of the promises of the Koran to those who show mercy to the suffering; that Allah would reward even a cup of water given to the thirsty.

It required no little courage of the Bedouin boy, all alone under Mount Hor, but he resolutely turned back, filled with water the wooden cup which a shepherd always carries at his girdle, and poured it down the parched throat of the almost insensible man.

"Bless God for water!" he gasped. "More! give me more!"

Kanana ran to the brook and filled the cup again, but the poor man shook his head. It was too late. He was dying.

Suddenly he roused himself. He made a desperate struggle to call back his failing senses, and, for a moment, threw off the hand of Death.

He had almost given up, forgetting something of great importance. Steadying himself upon his elbow, he looked into Kanana's face and said:

"You are a beardless youth, but you are an Arab. Listen to me. The mighty Prince Constantine, son of the Emperor Heraclius, is soon to leave Constantinople, at the head of a vast army of Turks and Greeks and Romans, like the leaves of the forest and the sand of the desert. He is coming to sweep the Arab from the face of the earth and the light of the sun. We were bearing a letter to the Caliph Omar, who is now at Mecca, telling him of the danger and asking help. If the letter does not reach him Arabia is lost and the Faithful are destroyed. Would you see that happen?"

Too frightened to speak and hardly comprehending the situation, Kanana simply shook his head.