Maggie's Letter

You can get Maggie's Letter after Maggie becomes rich. She will tell you about Moe the Moblin. She will also give you her letter to Moe. Put this in the postbox on Windfall Island. Go back to Maggie's House and find Maggie's Father and a Rito postman fighting. After the postman leaves, go to the Coffee Shop and find him there. He will give you Moe's Letter. Bring this to Maggie and she will reward you with a Piece of Heart.