Lost in the wilds of the Amazon country—at the mercy of the stalking, silent beasts of the jungle! Racked by hunger and thirst—and rescued from that faet only to be doomed to death by a tribe of savage natives!

Surrounded and threatened by many dangers, Hal's warm sympathy for an exiled American family leads him through desperate hardships. Can he finally solve the tragic mystery that surrounds the lost mine of the Amazon?

A revolution had brought Hal and his Uncle Denis to this wild country on the track of a band of merciless smugglers. Rebel spies cause them plenty of trouble, but a new-found friend puts them on the right trail.