1859–1860 Map of the area between Duxbury Reef and Punta de los Reyes (including Drakes Estero) by A.F. Rogers.
Map courtesy of the University of Alabama, https://alabamamaps.ua.edu/historicalmaps/Coastal%20Survey%20Maps/california-northern.htm
Map courtesy of the University of Alabama, https://alabamamaps.ua.edu/historicalmaps/Coastal%20Survey%20Maps/california-northern.htm