Map of California as an island. Detail form ""A Map of North America with the European Settlements & whatever else is remarkable in ye West Indies from the latest and best observations."" 1745, by Richard William Seale (1703 - 1762), London. Copper-engraved, hand-colored in outline and partially in wash. Source: ""The Cooper Collections"" (uploader's private collection). Digital image by uploader, Centpacrr