California Biographies Source: History of Napa and Lake Counties San Francisco, Slocum, Bowen & Co., Publishers. 1881 Transcribed by Peggy Hooper 2011 This file is part of the California Genealogy & History Archives http://www.rootsweb.ancestry.com/~cagha/index.htm ISAAC G. CLARK. Son of Lafayette and Mary Hoyt Clark, was horn in Crawford County, Pennsylvania, August 26, 1854. He, with his parents, moved when he was ten years of age from his birthplace, and settled in Chautauqua County, New York, and resided there until October 21, 1878. In that year he moved to California, and on December 13,1880, he purchased his present place of one hundred and twenty acres, and is chiefly engaged in farming.