In the same year that the Augustinian Fray de Rada wrote about Masbat's gold mines, his fellow Augustinian Fray Alonzo Jimenez landed in Burias and baptized its chieftain Buaya. This baptism is said to be the very first baptism in Luzon. Fray Jimenez also built a church in Burias before he sailed on to Ibalon in 1570. By 1575, Masbate had become a priority in the Augustinian Missionary Memoranda. Fray Francisco de Ortega reported on the pillaging activities of a pirate named Caxabic in the islands of Masbate and Burias. By 1600, the Spaniards had developed Mobo as a galleon shipyard and San Jacinto as a strategic port. In 1605, Masbate was officially an Augustinian Mission and it is first prior was Fray Francisco Guerrero. Masbate had about 250 tributes and 1000 Christian natives. In 1609, Fray Pedro de Arce, bishop-elect of Nueva Caceres, ceded the spiritual administration of Masbate to the Mitra (secular clergy). On May 28, 1682, bishop-elect Dominican Fray Andres Gonzales petitioned the King of Spain to revert some curacies of Nueva Caceres to the charge of religious communities. The petition was approved in 1685 and by 1687, the first Augustinian Recollect missionaries had sailed for the port of San Jacinto to begin the Recollect Mission in Masbate. In 1700, Fray Ildefonso de la Concepcion established the settlement of Uson as a visita(barrio) of Mobo. The town of Masbate was established in 1791 by Fray Manuel dela Virgen del Tremedal.