Presently the trail became soggy and he had to help his horse.

The mustang floundered in the soft snow and earth.

Cedars and pinyons appeared again, making travel still more laborious.
All at once there came to Slone a strange consciousness of light and wind and space and void.

On the instant his horse halted with a snort.
Slone quickly looked up.

Had he come to the end of the world?
An abyss, a canyon, yawned beneath him, beyond all comparison in its greatness.
His keen eye, educated to desert distance and dimension, swept down and across, taking in the tremendous truth, before it staggered his comprehension.