Chapter 13 THE VOLLEY IN THE CANYON.

Nat had stopped in the nick of time. As the auto came to an abrupt halt, almost jolting those in the tonneau out of their seats, there was a roar like the voice of an avalanche. From far up the hillside a cloud of dust grew closer, and thundered past like an express train. In the midst of the cloud was the huge, dislodged rock, weighing perhaps hal