Courtesy of American Museum of Natural History.

Finding the Eobasileus.

Haystack Mountain, in the Bad Lands of Wyoming: the museum explorer is standing at spot where the skeleton was discovered.

Courtesy of American Museum of Natural History.

The Eobasileus or Loxolophodon.

A four-horned amblypod (blunt-feet) the largest and last of his race, of which vast herds roamed over the United States three million years ago.

The scientist looked across the table at his brother.

“We’re going to make a paleontologist out of this chap after all, I believe,” he said. “Now, Perry, was there any horse earlier than the Eohippus?”

“There’s one awfully like Eohippus that they found in the London Clay,” the boy answered. “Let’s see if I can remember what he’s called? He isn’t a ‘Hippus’ anything!”