(Ohio Star, IA-12-29) S. of Clarksville, Butler Township, Butler County, IA. Main St. (IA188) S. 0.75 miles from jct with Superior St. in Clarksville to the quilt on the E. side of the road at 19782. Paul & Lucille Leerhoff. (N42 45.772 W92 39.715) Photos by Jack & June Schmidt 7-7-12.