The first Duff School was located in Section 5, T.29 N.-R.1 W. in Aetna Twp. in Logan Co. Later, after they moved, the Duff School was located on Hwy. 10 in East Lincoln Twp. - Twp. 20 N. - R.II W - Sec. 28. Both buildings still exist -- folks purchased the buildings -- did some remodeling and live in them as their homes. MJD