Apr 8 Barton Creek, 4 mi. ESE Austin, 500 ft., Travis Co., Texas I remained in that area until 9:55 and heard [illegible] mouse (presumably of the same pair seen 9:30) to N once during this 25 minutes. I retraced my steps paralleling the base of the hill in a general SE direction. I heard two ♀♀ singing in the general area where ♀ 537 was taken but was confused as to that location and the area where I had watched a love bird 7:20-7:40. I reached the path leading to the farm buildings at 10:15. Titmouse singing in juniper-Spanish oak of slope there and others in clearing where residence lies. The density here is marked in comparison to the Guadalupe River county. I left the farm at 10:40 after taking 2 photographs. LIGHT BREEZE intermittent after 8:30 ♀ 537 had brood patch well developed; oviduct diminished in size; ovary preserved in formalin ♀ 538 appeared to be laying or would do so in a day or two largest ovum 7 mm; oviduct larger than ♀ 538 - brood patch not noticeably thickened nor extensive. Apr. 9 HIGH THIN CLOUDS DIMMING SUN; CALM. I reached the Gainer farm at 7:20 and walked to the edge of the flat on which the buildings are situated, the brink of the Barton Creek gorge which is perhaps 100 ft deep. 7:22 Titmouse singing in "cedar" elm on flat; a very very rapid consisting of coupled "bear" notes as bear-bear- bear-bear - etc.: soon shifted to "bear- hear" of usual slower spacing than peter-peter in answer to ♀ to SW. Singer was a typically black-crested bird. His mate