Fort New Gothenborg (Nya Göteborg), now Essington, Pennsylvania 1643-1655[1]
↑Albert Cook Myers, Narratives of Early Pennsylvania, West New Jersey and Delaware, 1630-1707 (New York: Charles Scribner’s Sons, 1912; reprint Barnes & Noble, 1959; digitized by Google, 2008), 28 note 1. “Fort Nya Göteborg or New Gothenburg on Tinicum Island.”