Pendleton Woolen Mills has an interesting history of their Indian trading blankets. I got curious about trading blankets when I was working on a quilt recently. I was using a 2.5 inch strip set and had a plan for what I was going to do. I happened to pin a few of the strips on in a way that reminded me of trading blankets so I went with it. Serendipity is the friend of creativity. You just have to be paying attention!