Dim prospecting. Howie Alden is determined to investigate the Dolson Creek cave (where two goldhunters disappeared in 1936) in the hope of shelving a ""Sonny-Bumps"" nickname from two older fellows. A wild scream in the night scares the three off, but Howie pursues the legend as he travels for a spell with pet prospector Bootjack and his burro, even camping out for a night (actually half a night-mysterious groaning) in the same room long-lost Prince Jack occupied in gold mining days. Eventually, Howie faces the cave and, leaving his mark as proof of entry, he hears the burro cry; detecting traces of a cave-in, he alerts his Pop, crawls to buried Bootjack, also finds a skeleton Oust before more wall crumbling) whose position and wallet clue them in to previous visitors' mishaps. There's gold in those walls, and Bootjack signs the rights over to his rescuer. The strange sounds all have natural explanations (cataracts, cougars and weeping willows) but this team's been on the trail for a long time for so few nuggets to pan out (and some may object to the manhood sign -- a Winchester replacing a .22).