Here’s the fourth clue in the “Legend of the Lake” 2008 medallion hunt:

“Keystone walls will lead you

Where no one else can see you.”

The previous clues are:

Clue No. 1: “Fourteen lakes each with its own history;

Near which I lie is the mystery.”

Clue No. 2: “Don’t look for me on manicured ground;

In Mother Nature is where I will be found.”

Clue No. 3: “Three birds in a row;

Right wings pointing to lakes below.”

 Look for clue No. 5 in the July 26 print issue and online version of the Prior Lake American.