[1] Francisco Lopez and José Arellanes were granted three square league Rancho Temescal in 1843.
The grant was later transferred to Ramon de la Cuesta and Francisco Gonzales Ciminio.
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.
[2][3] The Land Commission rejected the claim on the grounds that the boundaries were vague, but the United States district court confirmed the grant.
[6][7] In 1887, the sons of Ygnacio del Valle sold Rancho Temescal to David C. Cook from Elgin, Illinois, who had come west because of poor health.