The same year, Mexican revolutionary general Francisco Javier Mina visited and successfully encouraged Aury to join him in an invasion, which failed. Morin da Porta left Galveston and soon died, and João sold Aury's camp and supplies to Jean Lafitte, who relocated to Galveston from Matagorda Bay on 15 May 1817. A year later, João was appointed supercargo for trade with the Karankawa Indians. Lafitte left in 1820, and João later returned to New Orleans.