Tarzan's Secret Treasure (1941) on Netflix

Plot summary

Tribesmen capture Boy, and Professor Elliott and his exploring party set him free. Tarzan then guides the group over the escarpment by a route that shortens their journey by several weeks. Tarzan, Jane and Boy make their home on the escarpment, and the travelers arrive there on their way to a destination beyond it. Trouble begins when Boy tells two of the men that gold lies in the river bed beside his home. Greed takes hold of Medford and Vandermeer, who want Tarzan to reveal where the gold is, and they will go to considerable lengths to get their hands on it.