Abstract The Cotas the and Yorbas were prominent and wealthy land-owning families who played an integral role in early California history and politics. Pablo Antonio Cota and Jose Antonio Yorba both participated in the Portola expedition and were granted vast stretches of California land as a result. This collection consists of legal documents pertaining to the Yorba and Cota families ranging from 1837 to 1897. The documents relate to land ownership, lawsuits, wills, and financial dealings.