"You seem to think," responded the chief with a smile, "that the race of wizards has been reborn and christened the Geological Survey, as a visiting diplomat once said of us."
"Well, pretty nearly," answered the boy.
"We're not quite that," admitted the other, "but," with a smile of mystification, "I do carry a little device by which I can make use of a system of wireless telegraphy which was in existence thousands of years ago."
"And can I see it?"
"Certainly," replied the topographer, and drawing his hand from his pocket, he showed it open to the boy.
"That's just a looking-glass," cried Roger in disappointment, having expected to see some delicate and ingenious piece of intricate machinery.
"Just a piece of looking-glass," assented his chief. "What then?"
"But how do you work it? What can you do with that?"
"That, my boy," answered the older man, "is one of the very many things you will learn while you are in and about the Grand Canyon."