Zephaniah Kingsley was both a defender of slavery (albeit the system practiced under Spanish rule) as well as an aggressive activist for the legal rights of free blacks. Zephaniah Kingsley moved to Florida in 1803 and began buying land and slaves. In 1810, he purchased Fort George Island, including its cotton and indigo plantation. Also at this time, Kingsley purchased a young woman from Jolof, Senegambia, named Anta Mujigeen Ndiaye, whom he then freed and made his wife. Following their marriage, she changed her name to Anna Kingsley.