Lodge, John. "A correct chart of the North Sea, with the adjacent coasts of Britain, Holland, Germany, Denmark, Norway, the islands of Orkney and Shetland, the entrance to the Sound and the Baltic Sea." Map. London: J. Bew, 1781. Norman B. Leventhal Map & Education Center, https://collections.leventhalmap.org/search/commonwealth:kk91fr289 (accessed April 19, 2024).