	Before his appointment to his position in Trinidad, Sedeño had been the Royal Treasurer of Puerto Rico. He obtained a letters patent from the King appointing him as the Captain and Governor-General of Trinidad on July 12, 1530. He then sailed from the port of Sanlucar de Barrameda, returned to Puerto Rico and arrived in Trinidad on November 8, 1530 with two caravels and seventy men. He landed on the Bay of Erin, which provided shelter and was the only coast of the island known to the Spaniards at the time.