Then the door was opened softly and an arm clad in khaki was thrust through the narrow opening.

Fremont waited, but no face followed the arm into view.

Then, approaching nearer, he saw something on the sleeve which sent the hopeful blood surging through his veins.

It was the badge of the Black Bear Patrol, and beneath it was the Indian arrow-head badge of the Boy Scouts.

With a shout he caught at the door and threw it open.