SEDENO, Antonio (say-dayn'-yo), Spanish soldier, born in Spain about the end of the 15th century; died in Cubagua, Venezuela, in March, 1538. He went to Santo Domingo with Diego Columbus in June, 1509, where he served till 1512, when he was appointed by King Ferdinand first treasurer of Porto Rico. In 1515 he became alderman of Saint John. Several years afterward, being accused of peculation in the treasury, he was imprisoned, but escaped to Santo Domingo, where he served until 1528. On his return, an expedition to the Windward islands, especially Trinidad, the headquarters of the Carib Indians, who devastated Porto Rico repeatedly, was suggested by the governor, and Sedeno sailed to Spain, where he obtained a royal permit for the conquest of the island of Trinidad He returned to Porto Rico, where he recruited 150 men, and sailed early in 1530, landing on the southwest coast of the island in the territory of Cacique Chacomar, by whom he was received in a friendly manner. Soon the abuses of his followers caused a general revolt, but, aided by Chacomar, Sedeno defeated the natives in many encounters, and built a fortress, which he called Paria. Leaving a garrison, he returned in 1531 to Porto Rico, carrying many Carib prisoners; but on his arrival he was forced to release them. Although meanwhile Geronimo Ortal had been appointed adelantado of Trinidad and taken possession of Fort Paria, and Sedeno's claim had been declared void by the audiencia of Santo Domingo, the latter gathered some troops in Porto Rico. to whom he promised the fabulous wealth of the River Meta, which was included in his original grant. He landed in Trinidad during Ortal's absence, captured Fort Paria by surprise, and. entering by the river Pedernales, invaded the mainland, where he had serious disputes with Ortal about the boundaries of his province. He was finally poisoned by his native cook in the island of Cubagua.