George Bird Grinnell,
Jack, the Young Ranchman: A Boy's Adventures in the Rockies
“ If both of 'em are the same size they may keep that up for an hour or two, but if one is considerable bigger than the other, he will push the little fellow back, slowly at first, but gradually faster and faster, until he gets a side push on him, and then the little fellow's got to be mighty spry, to get out of the way before the big one hits him with his horns.""It must be great to see a fight like that," said Jack."Well, you'd think so; two big animals and with big horns like that, but really, it ain't much fun; they fight so slow; there's no jumping around, no quick work. ”
