Ray Stricklyn

When a handful of settlers survive an Apache attack on their wagon train they must put their lives into the hands of Comanche Todd, a white man who has lived with the Comanches most of his life and is wanted for the murder of three men.

The boisterous, arrogant professor Challenger, a reputed biologist and anthropologist, dares the London Zoological Society to mount an expedition to verify his spectacular claim, without physical proof, that his previous expedition to the Amazonian basin found live dinosaurs.