May. 1921. Boulder Creek. May 24 Warmer, Clear most of the day- Cassin Vires came thro' garden. Young gone from Vires's nest Lutesew Warbler's nest. James heard Poor Will in evening. May 25. Warm. Clear all day. Heard mystery bird at 3:45 A.M. Cassin Vire very prominent. May 26. Very warm. Had supper by the river. May 27. Heard mystery bird with loud liquid note very early. A little later heard similar strain in higher pitch (violet green swallow?) - all before dawn. May 28. Cloudy. Sprinkled a little. Mrs. Fer- queen and Elizabeth came out with them to get Cancer-root. Heard Butlers Vires and Vagons were. In afternoon drove with Wita to Santa Cruz-very bad detour through sandy hills- Came back on train. May 29. Heavy rain all a.m. Walked to Farnount in late p.m. Saw Ash - White-tailed Flycatcher at top. Violet-gz. Swallows near station, Water Oyce at railroad bridge and Calif. Woodpeckers in two places.