A great invention, those strings that sew shut bags of animal feed!  For years I have fumbled my way from one end of the seam to the other, trying to find the magical string among the bundle that will, with one quick tug, untangle the stitch all the way across the top of the bag.  But it has to be the RIGHT string; no other will work.  And then, voila, the bag is open and the contents are available. In writing the story of the farm, I feel like I am opening that feed sack once again.  How to find the right string?  How do I untie this story so…