From the plaque:
Near this site, Isaac Williams
in 1841 built a large adobe home, located on the 22,000-acre
Rancho Chino which he acquired from his father-in-law
Antonio Lugo. The 'Battle of Chino' occurred at the adobe
on September 26-27, 1846, during which 24 Americans were
captured by a group of about 50 Californios. Located on
the Southern Immigrant Trail to California, the adobe
later became an inn and stage stop famous for its hospitality.
Plaque placed by the State Department of Parks and Recreation in cooperation with Chino Valley Historical Society, Billy Holcomb Chapter of E Clampus Vitus, and San Bernardino County Museum, June 5, 1982.