Check out the full version of the Hero and Leander story as told by our buddy Thomas Bulfinch in The Age of Fable. Short and sweet.
LEANDER was a youth of Abydos, a town of the Asian side of the strait which separates Asia and Europe. On the opposite shore, in the town of Sestos, lived the maiden Hero, a priestess of Venus. Leander loved her, and used to swim the strait nightly to enjoy the company of his mistress, guided by a torch which she reared upon the tower for the purpose. But one night a tempest arose and the sea was rough; his strength failed, and he was drowned. The waves bore his body to the European shore, where Hero became aware of his death, and in her despair cast herself down from the tower into the sea and perished.