Prince Henry's work was, above all, justified by its permanence. Unlike earlier ancient and mediæval attempts at West African exploration, his movement issued in complete success. Azurara gives us, no doubt, a fairly complete account of the earlier stages of that movement, but it is probable that even his record omits some of the ventures undertaken from Portugal along the West African mainland; while it is certain that we must look elsewhere for a completer picture of the Infant's activity among the Atlantic Islands and in the Great Ocean. These additional sources of information must be examined in turn. First of all, it will be advisable to finish the chronicle of West African coasting down to the Navigator's death. After that, the triumphant prosecution of this line of advance to the Cape of Good Hope will call for a brief notice. And, thirdly, something must be said about the progress of discovery and colonisation in the archipelagos of Madeira, the Canaries, the Azores, and the Cape Verdes, especially considered in relation to that Westward route to India which Columbus advocated and commenced. It has already been stated that although Azurara's Chronicle officially ends in 1453, and appears to record nothing later than the events of 1448, yet very important expeditions were sent forth in the last years of the Prince's life, especially those of Cadamosto[33] and Diego Gomez. An attempt has been made to prove that the second voyage of Cadamosto, on which he claimed to have discovered the Cape Verde Islands, is untruly reported and may be dismissed as fabulous. But there seems no sufficient ground for this. "In an account of travels, printed long after its author's death, some contradictory statements, possibly arising through copyists' errors, do not justify such a conclusion." And the mistakes contained in the assailed narrative are not serious or unexplainable enough for rejecting it as a whole.[34] Luigi, Alvise, or Aloysius, da Ca da Mosto[35] was a young Venetian (a noble, according to some) who had embarked on August 8, 1454, with Marco Zeno on a commercial venture,[36] and was delayed by storm near Cape St. Vincent while on his voyage from Venice to Flanders. He now heard of the "glorious and boundless conquests" of Prince Henry, "whence accrued such gain that from no traffic in the world could the like be had. The which," continues the candid trader, "did exceedingly stir my soul, eager as it was for profit above all other things, and so I made suit to be brought before the Infant"--who was then at the village of Reposeira, near Sagres. Cadamosto was easily persuaded to sail in the service of Portugal,[37] and set out, with Vicente Diaz, on March 22, 1455. He visited Porto Santo and Madeira, and at Cape Branco began a "peaceful exploration" of the interior, for the study of its natural conditions, inhabitants, trade, and so forth. Proceeding to the Senegal, he continued his investigations; which were extended to the Canaries as