and the estuary and 44800 acre of surrounding land was deeded to Sergeant Luis Maria Peralta to become Rancho San Antonio.

After gold was discovered in 1848 in present-day Coloma 125 mi to the northeast, Anglo squatters led by lawyer Horace Carpentier took control of the East Bay area which would later become downtown Oakland, including the estuary known as "San Antonio Slough". Oakland was incorporated