Alexander Thompson, a United States citizen granted a commission as first lieutenant in the Mexican Navy, served on the brig Bravo from June 1826 to February 1827. He also served as second in command on the corvette Libertad from February to May 1827, when he was appointed commander of a captured schooner in which he was taken prisoner by the Spanish and carried to Havana. In October he was exchanged and returned to Mexico, where he continued in service as commander of the brigs Victoria and Bravo. In September 1828 Thompson was placed in command of the schooner Luciana with a commission to map the coast of Galveston Island. Having received compensation for only nine months of service, and that in driblets, he filed a petition with the Mexican government, asking that in recognition of his services he be granted San Luis Island, opposite Galveston, for colonization purposes. The Mexican government rejected the petition on the grounds that it was not fitting that San Luis be colonized.