The earliest arrival of people in the islands now known as The Bahamas was in the first millennium AD. The first inhabitants of the islands were the Lucayans, an Arawakan-speaking Taino people, who arrived between about 500 and 800 AD from other islands of the Caribbean. Recorded history began on 12 October 1492, when Christopher Columbus landed on the island of Guanahani, which he renamed San Salvador Island, on his first voyage to the New World. The earliest permanent European settlement was in 1648 on Eleuthera. During the 18th century slave trade, many Africans were brought to the Bahamas as slaves to work unpaid. Their descendants now constitute 85% of the Bahamian population. The Bahamas gained independence from the United Kingdom on July 10, 1973. Early history Sometime between 500 and 800 AD, Taínos began crossing in dugout canoes from Hispaniola and/or Cuba to the Bahamas. Suggested routes for the earliest migrations have been from Hispaniola to the Caicos Islands, from Hispaniola or eastern Cuba to Great Inagua Island, and from central Cuba to Long Island (in the central Bahamas). William Keegan argues that the most likely route was from Hispaniola or Cuba to Great Inagua. Granberry and Vescelius argue for two migrations, from Hispaniola to the Turks and Caicos Islands, and from Cuba to Great Inagua. From the initial colonisation(s), the Lucayan expanded throughout the Bahamas in some 800 years (c. 700 – c. 1500), growing to a population of about 40,000. Population density at the time of first European contact was highest in the south-central area of the Bahamas, declining towards the north, reflecting the migration pattern and progressively shorter time of occupation of the northern islands. Known Lucayan settlement sites are confined to the nineteen largest islands in the archipelago, or to smaller cays located less than one km. from those islands. Population density in the southernmost Bahamas remained lower, probably due to the drier climate there (less than 800 mm of rain a year on Great Inagua Island and the Turks and Caicos Islands and only slightly higher on Acklins and Crooked Islands and Mayaguana). European exploration In 1492 Christopher Columbus sailed from Spain on his first voyage with three ships, the Niña, the Pinta, and the flagship, Santa Maria, seeking a direct route to Asia. On 12 October 1492 Columbus reached an island in the Bahamas and claimed it for Spain, an event long regarded