"A heavy one?" asked Tad.
"A regular hummer!"
"Rain?"
"Everything. The whole thing. I'm sorry now that we didn't go back up the trail, but maybe we'd never got up before we were caught. However, we're pretty safe down here, unless——-"
"Unless what?" piped Chunky.
"Unless we get wet," answered Nance, though Tad knew that was not what was in the guide's mind.
Just as they were turning back to the camp there came an explosion that seemed as if the walls of the Canyon had been rent in twain. Chunky uttered a yell and leaped straight up into the air. Tad took firm hold of the fat boy's arm.
"Don't be a fool. That was thunder and lightning. The lightning struck somewhere in the Canyon. Isn't that it, Dad?"
Nance nodded.
"It's always doing that. It's been plugging away at Dad's Canyon for millions of years, but the Canyon is doing business at the same old stand. I hope those pintos are all right up there," added the guide anxiously.