Site, today a National Historic Landmark, is the location of the second Fort Mose." During the nineteenth century, this site became marsh and wetlands. In 1763, Great Britain took over Florida in an exchange with Spain after defeating France in the Seven Years' War. Spain evacuated its citizens from St. Augustine, including the residents of Fort Mose, transporting them to Cuba. As Britain developed the colony for plantation agriculture, the percentage of slaves in the population in twenty years rose from 18% to almost 65% by 1783. Texas and the southwest An African slave, Estevanico, reached Galveston island in November 1528, with the remnants of the Narváez expedition in Florida. The group headed south on the mainland in 1529, trying to reach Spanish settlements. They were captured and held by Native Americans until 1535. They traveled northwest to the Pacific Coast, then south along the coast to San Miguel de Culiacán, which had been founded in 1531, and then to Mexico City. Spanish Texas had few African slaves, but the colonists enslaved many Native Americans. Beginning in 1803, Spain freed slaves who escaped from the Louisiana territory, recently acquired by the United States. More African-descended slaves were brought to Texas by American settlers. Virginia and Chesapeake Bay The first recorded Africans in Virginia arrived in late August 1619. The White Lion, a privateer ship owned by Robert Rich, 2nd Earl of Warwick but flying a Dutch flag, docked at what is now Old Point Comfort (located in modern-day Hampton) with approximately 20 Africans. They were captives from the area of present-day Angola and had been seized by the British crew from a Portuguese slave ship, the "São João Bautista". To obtain the Africans, the Jamestown colony traded provisions with the ship. Some number of these individuals appear to have been treated like indentured servants, since slave laws were not passed until later, in 1641 in Massachusetts and in 1661 in Virginia. But from the beginning, in accordance with the custom of the Atlantic slave trade, most of this relatively small group, appear to have been treated as slaves, with "African" or "negro" becoming synonymous with "slave". Virginia enacted laws concerning runaway slaves and 'negroes' in 1672. Some number of the colony's early Africans earned freedom by fulfilling a work contract or for converting to Christianity. At least one of these, Anthony Johnson, in turn, acquired slaves or indentured servants for