Jolene's letter

In Phantom Hourglass, you fight a person named Jolene multiple times. After having a few fights, Linebeck and Link head off to any island you specify. The first mailbox you see will be bouncing up and down, indicating that you have a letter waiting to be read. Walk to it and the flying mailman will give you a letter from Jolene's sister, Joanne, to her. The mailman will realize he made a mistake, giving you the letter and asks you to give it to Jolene. The letter merely talks about Jolene and her "pirate costume" amongst other things.