Sainsevain, a carpenter, came from
Bordeaux, France to
Santa Barbara, California on the ship
Ayacucho on July 4, 1839. He had been sent by his family to find his uncle
Jean-Louis Vignes in Los Angeles. He settled on Vignes' property,
El Aliso, and assisted with growing grapes and oranges, and with winemaking. In 1840, he loaded a shipment of wine and brandy on a ship to sell along the California coast. On this trip, he made his first visit to
Monterey and
Branciforte. In 1841 he worked at Vignes' sawmill near
San Bernardino. In 1843, Sainsevain was granted
Rancho Cañada del Rincon en el Rio San Lorenzo near
Santa Cruz, California by Governor
Manuel Micheltorena, and in the Fall of 1843 he built one of the first sawmills in the valley of the
San Lorenzo River, in association with Charles Roussillon (also known as "Rochon"), another Frenchman. In 1844, he was granted permission to start a flour mill with a daily capacity of 75
fanegas on the
Guadalupe River in
San Jose. In 1845, Sainsevain married Paula Suñol (1827–1883), whose father
Antonio Suñol owned
Rancho Los Coches. In 1846, Sainsevain and Charles Roussillon built a schooner (the
Antonita) on the beach at Santa Cruz. She was launched on June 25, and sailed to the Sandwich Islands (Hawaii) to have a
copper bottom installed. In 1847, Roussillon was the defendant in the first jury trial (
Isaac Graham vs. Charles Roussillon) in California. In 1848, Sainsevain and Roussillon went to the gold mines near
Coloma. Sainsevain, Roussillon, Antonio Sunol, and Amador, with help from twenty-five Indians, mined gold at Don Pedro's Bar on the
Tuolumne River. Sainsevain and Roussillon soon had enough of mining and returned to
Stockton in 1849 to open a store supplying the
California Gold Rush miners. They owned a hotel in San Jose that became California's first State House. Sainsevain was a delegate to the
1849 California Constitutional Convention in
Monterey. ==Wine==