The real story goes something like this: In 1511, messy political squabbling forced Ponce to surrender the governorship of Puerto Rico, an appointment he had held since 1509. As a consolation prize, King Ferdinand offered him Bimini, assuming the stalwart conquistador could finance an expedition and actually find it. J. Michael Francis, a historian at the University of South Florida, St. Petersburg who has spent decades studying the Spanish colonies in the Americas , says no mention of a Fountain of Youth occurs in any known documents from Ponce’s lifetime, including contracts and other official correspondence with the Crown. In...