He was a tax collector at Monterey in 1843, and one of the prime movers in the movement against Manuel Micheltorena 1844.
With the cession of California to the United States following the Mexican-American War, the 1848 Treaty of Guadalupe Hidalgo provided that the land grants would be honored.
[5][6] José Yves Limantour, who became notorious for his fraudulent claims, maintained that he had bought the grant from Chaves.
Thomas O. Larkin (1802 - 1858) claimed he bought Rancho Cienega del Gabilan from Chaves and received confirmation of it just after he died in 1858.
[13] The central portion of the Gabilan ranch was later owned by Egbert Judson of Giant Powder Company.