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.
As required by the Land Act of 1851, a claim for Rancho San Jacinto y San Gorgonio was filed with the Public Land Commission in 1852,[5][6] and the grant was patented to Louis Rubidoux in 1872.
[8][9][10][11] In 1869, Singleton sold the southern half of the rancho to Newton Noble.
In 1877, Noble lost his ranch to creditors, and it was bought at auction by Frank and Sarah Clough.
James Singleton appropriated all of the water in San Timoteo Creek, an act that initiated an 1880s lawsuit by ranch owners below the property and resulted in a ruling that allowed alternating use of the water by Singleton and other ranchers on a five-day cycle.