Getting to know the secret location of the so-called "spice islands"—the Maluku Islands, mainly the Banda, then the single world source of nutmeg and cloves, was the main purpose for the travels in the Indian sea—he sent an expedition led by António de Abreu to Banda (via Java and the Lesser Sunda Islands), where they were the first Europeans to arrive in early 1512, after taking a route through which they also reached first the islands of Buru, Ambon and Seram. From Banda Abreu returned to Malacca, while his vice-captain Francisco Serrão, after a separation forced by a shipwreck and heading north, reached once again Ambon and sank off Ternate, where he obtained a license to build a Portuguese fortress-factory: the Fort of São João Baptista de Ternate, which founded the Portuguese presence in the Malay Archipelago.