[1341 et seq.] As we have seen, the Canaries were known to the ancients, and made by Ptolemy the western limit of the world; but subsequently they were nearly forgotten until rediscovered and visited, perhaps several times, toward the middle of the fourteenth century, by the Portuguese. There is a definite account of one of these voyages. Two vessels were sent there by the King of Portugal in 1341, and nearly all the islands of the group visited, but no settlement was made. Before this, Luis de la Cerda represented to the Pope the existence of such islands, and received by a bull of lordship of them, with the title of Prince of Fortune. The king of Portugal claimed in 1345 to have sent out previous expeditions to the islands. The project of Cerda proved a failure and no colony was founded. Voyages to the Canaries became quite frequent before the end of the century. _Galvano_, _Discoveries_, London, 1862; and in _Collection of Curious Voyages_, London, 1812, p. 10; _Muñoz_, _Hist. Nuevo Mundo_, pp. 30-1; _Kunstmann_, _Entdeckung Am._, pp. 1-4. Major, _Prince Henry_, pp. 139-45, dates the bull 1334. [1346.] In August, 1346, Jaime Ferrer, a Catalan navigator, sailed from Majorca in the Mediterranean to search down the African coast for the Rujaura, or River of Gold, and never was heard from. This is proved by a document in the Genoese archives, and by an inscription on a Catalan map of 1375. Major shows this to have been an expedition in search of an unknown or imaginary river of gold, whose supposed existence rested on ancient traditions that a branch of the Nile flowed into the Atlantic, and which belief was strengthened by the gold brought from Guinea by the Arabs. Humboldt understands this Rujaura to have been the Rio d'Ouro below Cape Bojador, an inlet named later by the Portuguese; and he also states that Ferrer actually reached that point; but of this there seems to be no evidence. [1351 et seq.] The Azores appear to have been discovered by the Portuguese early in this half century, appearing on a map of 1351. There is however no account of the voyage by which this discovery was made, although there is a tradition of a Greek who was there cast away in 1370. On a Genoese map of the same date the Madeira group is shown, having probably been discovered by Portuguese ships under Genoese captains early in the fourteenth century.