Longhurst 1939 Itinerary July 3 Columbia R. at mouth of Deschutes R. in the sagebrush, but one jumped from under a ledge of basalt. The remains of a cottontail were also found. We left the island about 10 A.M. In the evening I set out 50 mice traps - mostly on a large sand railroad fill about 4 mi W of camp. At dusk I attempted bat shooting, but no shots presented themselves. Very few bats were seen flying -- possibly due to the cold windy weather. It had rained a little the night before. July 4 Columbia R. at mouth of Deschutes R. The catch in the 50 traps set on the sand railroad fill was: Peromyscus maniculatus 6 or 3 ♀ Perognathus parvus 1 ♂ All were caught in rather open sandy ground, and traps set in sagebrush produced no results. Traps were set about 5 yds. apart. The game refuge which extends for 4 mi. on each side of the Columbia R. seems to be quite beneficial to the Calif. valley grevil. They are numerous.