This can be seen by all of these maps of around this period that are made by Dutch/English/German cartographers that don't show California as an Island, includi

This can be seen by all of these maps of around this period that are made by Dutch/English/German cartographers that don't show California as an Island, including Munster's very popular one: http://www.ianchadwick.com/hudson/other_maps.htm http://www.ianchadwick.com/hudson/other_maps.htm