Now and then he turned and looked back impatiently, as if they were not coming fast enough; but at length he stopped and indicated the high ground to the north.

Its bold line, colored a soft blue, stood out against the yellow sky, and in one place there was a sharply defined gap.
"There!" he exclaimed breathlessly.

"I guess that's the _broken range_!" "I see the break," said Thirlwell.

"What about it ?" "Don't embarrass him," Agatha interrupted.

"It's something he remembers.
Perhaps his father talked about the gap." "He did," said Drummond.