Climb around to the roof over Zelda's room using the ledge by the upper entrance to the Knight Academy. Use the Clawshots on the target on the top of the chimney's reverse side to enter the academy. Note: If done at night, Gaepora will be taking a bath below where you land. Crawl through the passage to enter Zelda's room. Once there you can look at Zelda's Diary by sitting in her chair; get a Gratitude Crystal (at night); get a Heart Piece from the cabinet; and look at the Tingle doll.