 The grant overlapped the Rancho Rio de los Putos grant of William Wolfskill, and in 1845, Governor Pio Pico made a correcting grant 10 square leagues.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 Los Putos was filed with the Public Land Commission in 1853, and the grant was patented to Juan Felipe Peña and Juan Manuel Vaca in 1858.