Calaveras County, California (Hayward)
Gazetteer/Almanac
John Hayward, Gazetteer of the United States of America… (Philadelphia: James L. Gihon, 1854), 312.
Calaveras County, Ca., c. h. at Double Springs, otherwise called Pleasant Valley. In the mountains E. of the San Joaquin, between Dry Creek of the Moquelumne and the Stanislaus River.