Caso. July 1916 from the Yuba river. Wonderful air. James managed to make things comparatively comfortable before dark. Nine years since my last camping trip in high Sierra. July 9. Glorious day. Notes following birds. Mt. Quail (heard), Red-s. Flicker, Night-hawk, Calliope Hummer, Olive-backed Flycatcher, W. Wood-pewee, Blue-fronted Jay, Cassin Purple Finch, Green-backed Gull, Mt. White crowned Sp., Chipping Sparrow, Sierra Junco, Thick- tailed Fox Sp., W. Tanager, Tree Swallow, Warbling Vireo, Cassin Vireo, Yellow Warbler, Audubon- Warbler, Paleolated Warbler, Red-b. Nut-hatch, Mt. Chickadee, Ruby-c. Kinglet, Rust-backed Thrush, Western Robin (nest w. young in cottonwood tree 8 ft. fr. ground). Total 25- July 10. Brown Creeper (heard), Black-headed Grosbeak. Found Wood Pewee's nest w. young (very young) in Cottonwood tree 25 ft. up Parents brooding p. Poor Will, called about 20 times w. short interval after 2 or 25 calls.