The Pilgrim 39 S Progress By John Bunyan Ca 1870s can be very useful guide, and the pilgrim 39 s progress by john bunyan ca 1870s play an important role in your products. The problem is that once you have gotten your nifty new product, the the pilgrim 39 s progress by john bunyan ca 1870s gets a brief glance, maybe a once over, but it often tends to get discarded or lost with the original packaging.