“The waterfall I was trying to find.”

“You don’t mean to tell me you’re planning to crawl behind a waterfall and hide! Honestly, Bill, I—”

“Oh, nothing like that,” he answered coolly, “the fall isn’t big enough.”

“Look here, will you please—”

“All right, calm yourself. We haven’t much time but I guess they’ve lost our trail for the time being. On the way over here in the car, Terry told me something of the lay of the land. He’s crazy about hiking, you know, and mountain climbing. He’s walked all over the reservation and he knows it like his own back yard.”

“Yes, yes, what of it?”

“Well, Terry told me that there is just one possible way to get out of this Stony Hill River Valley on this side. That is, unless one goes a mile or two up or down the valley. There are entrances to the reservation at either end—dirt roads that cross from the concrete turnpike over to this ridge above us.”

“But there is a way out?”

“Yes. A sort of trail up the cliffs. It’s not marked on the map of the reservation. Terry found it last summer. Pretty tough going even in daylight, I guess.”

“But how on earth can we find it in the dark?”