“No,” said the professor, smiling; “but I have been along such a track as this before.”
“But there is no track,” said Frank. “We are going over smooth sand, and making a fresh one.”
“Which will all be obliterated in a few hours. It is a track, though, as your heap proves.”
“I should have liked to examine it, though.”
“Well, you will have plenty of chance, for we shall go pretty close to it—but on the windward side.”
Frank lowered the glass to look inquiringly at the speaker.
“Look here,” he said; “you mean something by the way you just spoke.”
“Certainly I did.”
“What?”
“Take your glass, and sharpen your powers of observation, my lad. The sooner you learn the desert the better for you.”