“Exactly. Water means life.”

“And Ibrahim can trust to his knowledge of the country to go straight to these places?”

“Yes; I have proved him over and over again. Now then: try the glass.”

“Yes,” said Frank, opening the case; “but tell me, do you mean to collect birds, insects, fossils, and plants?”

“Certainly, everything we can find; but only to examine at the end of the day. We must keep nothing; only make a few notes. Well, can you see anything?”

“Not yet. It is rather awkward to get a steady look with the camel moving.”

“If you catch sight of anything worth looking at you can check your steed.”

“Yes, there’s something moving yonder—a dog.”

“I doubt it,” said the professor. “Try again.”

“It looks like a dog. What is it then—a fox? Ah, it is gone behind those heaps yonder.”