"We start to-morrow, Ali," he said; "the beasts are fit."

Ali bowed and showed his white teeth.

"To-morrow," continued Abdullah, "since it is Friday; and immediately after the middle prayer. I hear in the bazaar that the well at Okba is choked. Can we make forty-two miles in one day, so as to cut Okba out?"

"We can," said Ali, "during the first three days, when the beasts do not drink; after that—no."

"Good," said Abdullah; "I will make a route."

Some one plucked at his sleeve and he turned.

"Sir," said a man with a white beard and eager eyes, "I learn that you start for Biskra to-morrow."

"If Allah wills," said Abdullah.

"In crossing the desert," said the old man, "I am told there are many dangers."

"Friend," said Abdullah, "in sitting at home there are many dangers."