In May 1848, some gold miners from Monterey began mining on the south bank of Dry Creek in Amador County on California’s Mother Lode. That year and in 1849, Eastman and Thomas and others, including some Mexicans, found the nearby gulches and ravines to be very rich. In February 1851, Davidson, a Baptist minister, saw gold in quartz on the south side of Amador Creek in Amador City, and with Glover, Herbert, Cool, and Hill he formed the Spring Hill Company, which established the first gold mill in Amador County and later became part of the Keystone Mine.