(Union Square, IN-63-01) W. of Petersburg, Clay Township, Pike County, IN. IN56 W. 9.6 miles from jct with IN57 (Main St.) on the SW side of Petersburg to the quilt on the N. side of the road at 8400. Sullivan’s Grocery. (N38 27.923 W87 26.104) Photos by Jack & June Schmidt 6-2-17.