of a black African man on a camel traveling from "Uuegar" (prob. Hoggar) to the town of "Organa" ("ciutat organa", variously identified as Kanem or Ouargla or possibly even a misplaced depiction of Ghana - long defunct, but, on the other hand, contemporaneous with the depicted Abu Bakr). Nearby sits its Arab-looking king ("Rex Organa") holding a scimitar. The River of Gold is sourced at a circular island, what seem like the Mountains of the Moon (albeit unlabeled here). From this same source also flows north the White Nile towards Egypt, which forms the frontier between the Muslim "king of Nubia" ("Rex Onubia", his range depicted by crescent-on-gold banners) and the Christian Prester John ("Preste Joha"), i.e. the emperor of Ethiopia in the garb of a Christian bishop (coincidentally, this is the first visual depiction of Prester John on a portolan chart). Uniquely, the Viladestes map shows another river, south of the Senegal, which it labels the "flumen gelica" (poss. angelica), which some have taken to depict the Gambia River. In the 1459 mappa mundi of Fra Mauro, drawn a half-century later, after the Portuguese had already visited the Senegal (albeit still trying to respect Classical sources), shows two parallel rivers running east to west, both of them sourced from the same great internal lake (which, Fra Mauro asserts, is also the same source as the Egyptian Nile). Mauro names the two parallel rivers differently,calling one "flumen Mas ("Mas River"), the other the "canal dal oro" ("Channel of Gold"), and makes the note that "Inne larena de questi do fiume se trova oro de paiola" ("In the sands of both these rivers gold of 'palola' may be found"), and nearer to the sea, "Qui se racoce oro" ("Here gold is collected"), and finally, on the coast, "Terra de Palmear" ("Land of Palms"). It is notable that Fra Mauro knew of the error of Henry the Navigator's captains about the Daklha inlet, which Mauro carefully labels "Reodor" ("Rio do Ouro", Western Sahara), distinctly from the "Canal del Oro" (Senegal River). European contact Christian Europeans soon began attempting to find the sea route to the mouth of the Senegal. The first known effort may have been by the Genoese brothers Vandino and Ugolino Vivaldi, who set out down the coast in 1291 in a pair of ships (nothing more is heard of them). In 1346, the Majorcan sailor, Jaume Ferrer set out