1920 May. Boulders Creek. in steep canyon. Gray Squirrel took sunbats on Johnson fence. Moved bed on to porch. May 15. Mysterious bird heard singing before dawn - half an hour before any other bird. Sounded far away. At dawn creepers were calling constantly. Purple Finch is most numerous judging from songs which were very varied and ecstatic. Located Allen Hummers nest from bed. Song of R.B. Thrush heard. May 16. Humming b. nest contained 1 egg. Night was cold. Warm during day - May 17. Hot. May 18. Hot. Hummer's nest contains 2 eggs. Cotton gathered from ends of swing rope. Walked up San Lorenzo River road 2 miles. Swall, close flock of birds size of Grosbeaks flew below me. Bare impression of black except middle of back which was rusty. Call a tow whistle. May 19. Hot. May 20. Cooler. May 21. Hummer Aldon remains on nest more than 5 minutes in early A.M. Then off for a minute. Tracks something in