From the Guidebook:
After an armed confrontation
on January 2 and a meeting the following day, Marine Captain
Ward Marston, commander of the United States expeditionary
force, and Francisco Sánchez, leader of the Mexican-Californian
ranchers, agreed to a treaty here on January 7, 1847.
U.S. forces were to recognize the rights of the Californians
and end seizures of their property.