The horses scrambled along the rocky bottom for a little way, then Boise disappeared.
Sunfish halted, threw his head this way and that, gave a suspicious sniff and turned carefully around the corner of a square-faced boulder.
In front was blackness.

Bud urged him a little with rein and soft pressure of the spurs, and Sunfish stepped forward.

He seemed reassured to find firm, smooth sand under his feet, and hurried a little until Boise was just ahead clicking his feet now and then against a rock.
"Coming ?" Marian's voice sounded subdued, muffled by the close walls of the tunnel-like crevice.
"Coming," Bud assured her quietly "At your heels." "I always used to feel spooky when I was riding through here," Marian said, dropping back so that they rode side by side, stirrups touching.
"I was ten when I first made the trip.

It was to get away from Indians.
They wouldn't come into these places.

Eddie and I found the way through.
We were afraid they were after us, and so we kept going, and our horses brought us out.