"No!" said Walter. "Then what are we going to do?"
"I don't know, Master Walter."
"We've got to get the stuff up here, that's all," answered Tad, with a firm compression of the lips.
"Then you'll have to borrow a flying machine if you do. That's the only way we'll ever reach the pack mule. Why, it's a mile down there—"
"Not quite," answered Tad.
"How deep do you think the gorge is, Tad?" asked the Professor.
"Oh, forty or fifty feet, I should say. I hardly think it is deeper than that. But that is quite enough—"
Tad, in the meantime, had been considering the problem, thinking deeply on the best means of solving it.
"Yes, I think I can do it," he decided.
"Do what?" asked Walter.