Zelda's Letter is an item that appears in Ocarina of Time and Spirit Tracks. It is a letter given to Link by Princess Zelda.
Ocarina of Time
After Link has defeated Queen Gohma Inside the Deku Tree, the Great Deku Tree tells him to go to Princess Zelda in Hyrule Castle. When Link meets Princess Zelda, she gives him her letter with her autograph signed on it as a royal decree. Link can show it to the Keaton Mask Soldier in Kakariko Village to be allowed to enter Death Mountain Trail.
After the ceremony where Link becomes promoted to Royal Engineer, Princess Zelda secretly slips Link a letter. The letter states that Princess Zelda privately wants to meet Link and includes a map showing the way to her chamber. The letter concerns Chancellor Cole
, as Princess Zelda suspects that Chancellor Cole is hiding something and planning something terrible.
Zelda giving Link Zelda's Letter in Spirit Tracks
Getting Zelda's Letter in Spirit Tracks
Map of Hyrule Castle from inside Zelda's Letter
Zelda's Letter from Ocarina of Time 3D