[2][3] The western part of the grant is under the waters of Lake Henshaw, formed in 1922 by a dam on the San Luis Rey River.
He settled at Los Angeles in 1831 and in 1836 married Anita Gale, daughter of a Boston sea captain, who had been brought to California when five years of age and placed in the care of the Pico family, by whom she was adopted.
In 1844, Governor Micheltorena granted the six square league Rancho San Jose Del Valle to Juan José Warner.
[7][8] 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.
[12][13] By about 1875, Louis Phillips and John G. Downey (1827–1894) owned most of the southern four square league Portilla Rancho Valle de San José and the northern six square league Warner Rancho San José del Valle.