(Sinnette, The Octagon Place, 45', 1855, IA-70-01) in Muscatine, Muscatine County, IA. Business 61 (Park Av.) S. 0.1 miles from jct with US61 & IA38 at the NE side of Muscatine, W. on Cleveland St. 0.05 miles to the house on the N. side of the road. (8-30-01, N41 27.154', W91 01.864')