Original sentence: It has been suggested that the island was first taken over by the Portuguese navigator Pêro de Mascarenhas (1470- June 23, 1555) during his voyage of 1512-13, but there is little corroborative evidence for this, while cartographic analysis points to a subsequent date, possibly 1532 or later.Portuguese explorers were the first European to discover and invade the island of Diego Garcia
Edited sentence: It has been suggested that the island was first explored by the Portuguese navigator Pêro de Mascarenhas (1470- June 23, 1555) during his voyage of 1512-13, but there is little corroborative evidence for this, while cartographic analysis points to a subsequent date, possibly 1532 or later.Portuguese explorers were the first European to discover the island of Diego Garcia