The armada arrived too late to supply information from the journey to Gama's heavily armed 4th India Armada, which had already left Lisbon. Revision of island discoveries There are doubts regarding the Third Armada's discovery of Ascension Island and Saint Helena. It is customary to credit João da Nova's Third Armada for discovering Ascension Island, albeit it named the island "Conception Island", on its outward journey in May 1501 and Saint Helena on his return journey on May 21, 1502. The main accounts that have led to this widespread belief are from Barros and Góis. Barros and Góis later suggest that Ascension island was re-discovered twice. Gama's returning Fourth Armada re-discovered it when it was returning to Lisbon in the spring of 1503; eyewitness Thomé Lopes gives the date as July 30, 1503. Afonso de Albuquerque's outgoing Fifth Armada discovered the island on May 20, 1503 and renamed it ilha da Ascensção. Nevertheless, modern historians have found anomalies with the conventional account, suggesting that Barros and Góis were mistaken and offering alternative accounts of the discovery of the two islands. In the Catholic liturgical calendar, the Feast of Conception is on December 8, while the Feast of the Ascension would be in May 1501. Historians contend that the latter fits the timing of the Armada's discovery better, so Nova would be unlikely to name it "Conception Island" rather than "Ascension". Furthermore, the Cantino planisphere, composed in late 1502 (after Nova returned, but before Albuquerque left), denotes an ilha achada e chamada ascenssam ("island found and called Ascension") but not St. Helena. However, Thomé Lopes, an eyewitness to the return of the 4th Armada, noted that Saint Helena was an "unknown island", and gave its position as 200 leagues away from "Ascension Island" – not "Conception". The 4th Armada had already left Portugal when Nova returned. Because of these two anomalies, Leite concludes that Nova discovered and named Ascension Island on the outgoing voyage on May 20, 1501 but did not discover St. Helena on the return voyage. Roukema disagrees with Leite. He cites that it would have been nautically bizarre for Nova, on his outgoing journey, to sail from Cape St. Augustine in Brazil to Ascension Island directly against the winds and currents. The usual route to the Cape of Good Hope was to follow an ocean current known as the South Atlantic Gyre, whose path additionally had favorable winds.