[FN#1] Herrera, Hist. General, Dec. I. Lib. LX. c. 11; De Laet,  Novus  Orbis, Lib. I. C. 16 Garcilaso, Just. de la Florida, Part I.  Lib. I. C.  3; Gomara, Ilist. Gin. des Indes Occidentales, Lib. II. c.  10. Compare  Peter Martyr, De Rebus Oceanicis, Dec. VII. c. 7, who says  that the  fountain was in Florida.
The story has an explanation sufficiently characteristic, having  been  suggested, it is said, by the beauty of the native women, which  none  could resist, and which kindled the fires of youth in the veins  of age.