Twining 1935 June 6, 1935 We skinned, set out gopher traps, and fixed up camp, for the remainder of the day. Just before supper I built a rock oven, which worked much to our surprise. Set out 11 traps along the transition line between Lodgepole Pine and Artemisia, along the slopes south of camp. June 7, 1935 The traps contained a Chipmunk and 3 Peromyscus. One Peromyscus is a typical sonoriensis, but the other two are smaller with no red, but dark grey, almost black on the back. We suspect these to be young sonoriensis. After breakfast we started toward the ridge to try for more squirrels and hoping for a Marmot. A short distance from camp we happened upon a large Lodgepole Pine which had been completely stripped of bark by Porcupines. The workings were more than a week old; for debarking began more than a foot higher than the present snow level. The tree from this level to the topmost point was completely stripped of bark. A large pile of chips at the bottom of the tree showed that the animal had cut off the outermost layer and had only eaten the inner or cambium layer. A young Fir next to the pine had also been partially stripped. After taking various pictures of the workings, we continued to the ridge where we separated; Oldrich to shoot squirrels in the rocks, and I to cover the hillside to the south hunting for White Tailed Jackrabbits. I immediately climbed to the crest where I found a large Marmot-inhabited rock. There were two