On drawn to life, get up to the part when you have unlocked secret beach and have told Jowee about it. Go there to see Mari and Jowee on the beach talking.
At some point their coversation goes a bit like this.
1. Go to Angle isle, and rescue all of the Rapos.
You'll notice that one of them is found in an ancient temple, wears a Indy-like hat, is a treasure hunter and is called Indee.
2. After Indee has settled into the town, talk to Indee's son a few times... more
Once you have made the observatory go behind it at night; there are words on the ground.