 The first sales of Rancho property began in 1849, when Vaca sold a half-league of land between Alamo Creek and Ulatis Creek to John Patton and Albert Lyon.In 1850 Peña sold a half-league to Jacob David Hoppe and Zimri Hollingsworth.Then in 1850, came the history making sale, when Vaca sold one square league (about 9 square miles) of land to William McDaniel with the provision that one square mile (640 acres) would be used to create a township called Vacaville.