looking down a dizzy slope.

"I hope my pony doesn't stumble," answered Ned.

"You won't know much about it if he does," called Tad over his shoulder.

"Never mind. We'll borrow an Indian basket to bring you home,"
laughed Stacy in a comforting voice.

The trail was the roughest and the most perilous they had ever essayed.
The ponies were obliged to pick their way over rocks, around sharp,
narrow corners, where the slightest misstep would send horse and rider
crashing to the rocks hundreds of feet below. But to the credit of the
Pony Rider Boys it may be said that not one of them lost his head for
an instant.

"How did this trail ever get such a name?" asked Tad of the guide.

"Yes, I don't see any signs of angels hereabouts," agreed Chunky.

"You never will unless you mend your ways," flung back Nance.

"Oh, I don't know. There are others."

"On the government maps this is called Cameron Trail, but it is best
known by its original name, Bright Angel, named after Bright Angel creek
which flows down the Canyon."

"Where is Bright Angel Canyon?" asked Tad.