The next morning we moved camp up to Lone Tree, the nearest 

 point on Henry's Fork to our find, where we spent one night on the 

 way out, as previously described. The great skull was embedded in 

 soft rock, on a small flat, where the mail road makes a steep plunge 

 from the valley of Henry's Fork to the lower level of the Bad Lands' 

 floor. That slope was known as the Henry's Fork Divide because it 

 marked the parting between the drainage of Henry's Fork and Smith's 

 Fork, both of which enter the Green River separately. As our time was 

 short, we worked hard over the excavation of that skull, which, as I 

 was assured from Dr. Whytock's fragments, belonged to Uintaiherium, 

 a member of the extremely strange and bizarre order of extinct hoofed 

 animals called Dinocerata. These might be roughly defined as six- 

 horned elephants, only, paradoxically enough, they weren't elephants 

 and they hadn't any horns. We had secured one fine skull of these in- 

 credible beasts in 1877 and another, in the Bitter Creek country, in 

 1878, both of them found by Frank Speir. Now we had a third, better 

 preserved than the others and retaining, as neither of them did, one of 

 the great, scimitar-like upper tusks. 



An argument against prohibition, or even temperance, might be de- 

 duced from this discovery. Had not the mail driver been drunk that 

 day, as he almost always was, the find would, in all probability, not 

 have been made till years afterwards. When the horses were going down 

 Henry's Fork Divide (they had to get on without a driver) "Whitey" 

 remarked to his passenger: "These buttes are all full of bones"; I omit 

 the alcoholic forms of speech. When Dr. Whytock was sceptical, 

 "Whitey" said: "I'll show you." Getting off the buckboard, he picked 

 up a crooked stick and began scratching away the soil and then called 

 to his passenger to come and see. He had exposed a strip of dark brown, 

 fossil bone, from which the piece that Dr. Whytock brought in to 

 Bridger was broken. There was no sign on the surface to guide 

 "Whitey 's" excavations and, not once in a million times, would such 

 haphazard scratching lead to any result, but he had "drunken man's 

 luck." 



While still engaged on this skull, we were seated around the campfire 

 one evening, smoking our postprandial pipes, when some one asked me 

 what I thought the ancestor of Uintatherium would be like, when he 

 was eventually discovered. Accordingly, I gave a descriptive sketch of 

 my ideas on the subject, constructing a hypothetical beast which no 

 one had yet seen, but which, if there were any truth in our evolutionary 

 conceptions, must once have existed. The next day, while we were 



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