Mercator, Gerhard,  and Hondius, Jodocus.  "West Morlandia, Lancastria, Cestria, Caernaruan, Denbigh, Flint, Meridionidh, Montgomery, Salpia, cum insulis Mania et Anglesey."  Map.  1633.  Norman B. Leventhal Map & Education Center,  https://collections.leventhalmap.org/search/commonwealth:6t053s71s (accessed November 15, 2018).