But at this moment a loud shout came up from the gorge below.
It was Barney’s voice raised in a note of alarm.
“My soul!” cried Frank, excitedly. “What can have happened?”
Both rushed to the edge of the canyon and looked over.
CHAPTER XX.
THE FLOOD—CORNERING THE FOE.
It was a thrilling sight which met their gaze.
They saw Barney leaping up and down and gesticulating wildly.
“What is the matter?” cried Frank.
But before the words had fairly left his lips he saw what was the trouble.
Along the bottom of the gorge a thin stream of water was flowing.