(Modified Twin Star, IA-22-25) W. of Guttenburg, Jefferson Township, Clayton County, IA. Garber Rd. W. 8.0 miles from jct with US52 on the S. side of Guttenburg to the quilt on the N. side of the road at 29135. Ron & Peg Schroeder. (N42 45.878 W91 13.750) Photo by Jack & June Schmidt 6-28-12.