I found this photo, dated September 1999, of a quilt made by Jeannette Knauff of Hillsboro, Ohio. According to the documentation I found in the Feedsack Club archives it is made from feedsacks containing purple prints in a log cabin style design to achieve the butterflies. The entire quilt is done in a quilt as you go technique. The back also is done in purple feedsacks.
I’m always elated at the creativity shown when working with Feedsacks.