"We'd have all looked like porcupines if we'd stayed there thirty seconds longer," he remarked to Joe, as he joined the rest of the party. "Them Miranhas are sure the dandy shots with a bow."

"Huh!" returned Joe jealously, "that nothing. My uncle out in Akotan, where I come from, he kill a man with an arrow half a mile away, and no use his feet either."

"That uncle of yours was some performer with a bow," returned Jud cautiously. "Half a mile is good shootin' even with a rifle."

"Some performer is right," chimed in Will weakly. "I learned long ago, when Joe and I were up by Wizard Pond, that that uncle of his held a world record in everything."

"Set me down, Hen," he went on. "I think I can do a mile or so on my own legs."

"From here on Pinto and I have been over this route," announced Professor Ditson. "Ten miles farther on is 'Sky Bridge.' If we can cross that and cut it behind us, we're safe."

Two by two, the members of the party took turns in helping Will along the Trail, which soon widened into a stone-paved road.

"This is one of the Inca highways," explained the scientist. "It leads from their first city clear to the edge of the jungle. Once," he went on, "the Incas ruled an empire of over a million square miles, equal to the whole United States east of the Mississippi River; but they never were able to conquer the jungle."

The road sloped up more and more steeply, and the going became increasingly difficult, but Professor Ditson hurried them on remorselessly.

"The Miranhas never give up a chase," he said, "and if they have succeeded in crossing the river above or below the ford, they may even now be hard on our heels."