Bowen, E. (1740). A large & accurate MAP of part of the Isthmus of Panama, taken from a Spanish drought exhibiting the Country adjacent to that City and Puerto Bello, with the Roads and Course of the River CHAGRE, by which the Treasure of the South Sea is conveyed a cross the Isthmus [Map]. Gallica. https://gallica.bnf.fr/ark:/12148/btv1b8493166k/f1.item.r=Panama.zoom