Jack alighted.
Going to the edge of the abyss he peered down.
It was not more than twenty feet deep.
Along the bottom flowed a wide, deep mountain stream.
Frank James and his horse had alighted in it without the slightest injury, and Jack saw the beast swim ashore and wade out.
They had been swept some distance down the stream by the fierce current, and had got out near a wide opening in the rocks on the side opposite Jack.
"Stop where you are!" shouted Jack.
The drenched fugitive looked at him and laughed ironically.
Then he dashed ahead, for Jack had drawn a pistol, and was aiming it at him.
Just as the horse leaped into the opening in the rocks, the young inventor fired at the bandit.