John Burroughs,
Camping with President Roosevelt
“ I never saw a better man with a team than he was. I had ridden on the seat beside him all the day previous. On one of the "formations" our teams had got mired in the soft, putty-like mud, and at one time it looked as if they could never extricate themselves, and I doubt if they could have, had it not been for the skill with which Marvin managed them. We started for the Grand Cañon up the Yellowstone that morning, and, in order to give myself a walk over the crisp snow in the clear, frosty air, I set out a little while in advance of the teams. ”
