The Adventures of Rex the Wonder Dog #23

Major Dennis, Danny, and Rex jeep through the mountains of Africa. They seek ancient cave paintings. But \"stone age\" critters - a giant boar, huge vultures, carnivorous fish - keep attacking for no known reason. Rex defends, but they're hounded everywhere. Spilled into a river, they emerge in the cave with the paintings. And see that a Rex figure was long ago worshiped for saving the local people. And the local animals still bear a grudge centuries later!