WELL BEFORE THE ISLANDS of the Lucayan Archipelago—which includes Turks and Caicos and the Bahamas—became famous as cruise ship ports of call, intrepid travelers journeyed there by canoe, likely in search of natural resources such as salt, conch, and sea turtles. The Lucayans, the people for whom the chain is named, are believed to have arrived around a.d. 800 from islands in the Greater Antilles, including Hispaniola, Cuba, and Puerto Rico. Their journey, researchers believe, represents the final push in a millennia-long expansion from northern South America up through the Antillean chain. Starting around 800 b.c., people who made ceramics began to migrate north from what is now Venezuela. Later, they were joined by other groups from various parts of South and, possibly, Central America, establishing trade networks across the…