File:Harvest Moon Tree of Tranquility - Gill - Request Event

Description
Talk to Gill at the Town Hall when he reaches 5 hearts. You will hear him mumbling to himself. When a dialogue option comes up, pick "I'll find it for you!"

At this point you can go to find Gill's journal. When it's found, return it to him to finish the request. Doing this request is necessary for marriage to Gill.