"Beautiful! Grand!" murmured Professor Zepplin.
"Reminds me of a Turkish bath I was in once in St. Louis," added Ned.
Tad Butler was silent. He was too profoundly impressed even to speak; and even the guide, familiar as he was with the scene, was silent and thoughtful, too. He understood full well the perils, the pitfalls for the unwary, that lay along the pathway of those who sought to traverse that barren waste.
At last he turned to Professor Zepplin.
"Shall we move?" he asked.
The Professor nodded.
"One of you boys get behind the burros and start them along, please," requested the guide.
Stacy Brown complied gleefully. No more pleasant task could have been assigned to him than that of prodding the lazy pack-bearers.
"Forward!" commanded Tom Parry.
The boys clucked to their ponies.