Suddenly he paused.

"I made a blaze hereabouts to show where to leave the trail.

There it is," he added, pointing to a slight notch cut in the trunk of an adjoining tree.
"But we've just passed one," said Dunn, "if that's what you are looking after, a hundred yards back." Brace uttered an oath, and ran back in the direction signified by his companion.

Presently he returned with a smile of triumph.
"They've suspected something.

It's a clever trick, but it won't hold water.