Hooper, 1938 Sarco Co, +1000 ft., 6 mi. NE Napa, Napa Co., Calif. June 22, This AM left previous camp to drive here for short stop (now 2 P.M.). Drove over Antioch bridge, across Shemman Island to Rio Vista thence to Fairfield and to Napa and up Sarco Creek road to this camp. Shemman Island is completely(or almost so) under cultivation. I saw no Salicornia patches--which is to say that salt marsh mammoths are now practically nil. Probably the marshes near Fairfield are also under cultivation. Could see no marshes near Fairfield. Potrero Hills and Montezuma hills are all dry and grass-covered. Some sandy areas--and formed as a result of dredging activities--were seen but they evidently supported only jackrabbits--as regards mammoths. Sign here was certainly scarce. All of the area is probably flooded during extreme high-water years. The hills on each side of Napa Valley are pretty well covered with vegetation beginning with open grassland down low and near the mouth of the valley oak woodland (+grass) gives way to manzanita and chamise, and finally