High up on one side was one of those big pivot rocks, or balancing rocks, as some call them, weighing all of a couple of hundred tons. Just the thing. I hit back for camp, keeping an eye open so the bull couldn’t slip past, and got my ammunition. It wasn’t worth anything with the rifle smashed; so I opened the shells, planted the powder under the rock, and touched it off with slow fuse. Wasn’t much of a charge, but the old boulder tilted up lazily and dropped down into place, with just space enough to let the creek drain nicely. Now I had him.”

“But how did you have him?” I queried. “Who ever heard of a man killing a mammoth with a hand-axe? And, for that matter, with anything else?”

“O man, have I not told you I was mad?” Nimrod replied, with a slight manifestation of sensitiveness. “Mad clean through, what of Klooch and the gun. Also, was I not a hunter? And was this not new and most unusual game? A hand-axe? Pish! I did not need it. Listen, and you shall hear of a hunt, such as might have happened in the youth of the world when cavemen rounded up the kill with hand-axe of stone. Such would have served me as well. Now is it not a fact that man can outwalk the dog or horse? That he can wear them out with the intelligence of his endurance?”

I nodded.

“Well?”

The light broke in on me, and I bade him continue.

“My valley was perhaps five miles around. The mouth was closed. There was no way to get out. A timid beast was that bull mammoth, and I had him at my mercy. I got on his heels again hollered like a fiend, pelted him with cobbles, and raced him around the valley three times before I knocked off for supper. Don’t you see? A race-course! A man and a mammoth! A hippodrome, with sun, moon, and stars to referee!

“It took me two months to do it, but I did it. And that’s no beaver dream. Round and round I ran him, me travelling on the inner circle, eating jerked meat and salmon berries on the run, and snatching winks of sleep between.