large carton filled with binders of covers, including but not limited to RFDs, machine cancels, RPOs, illegal postal stationery cutouts, aerograms, auxiliary markings, advertising, fancy cancels including Boston numerals, and more, even note a few Confederate covers/letters, mixed condition to be anticipated but many fine to very fine or better, an extremely useful group which essentially serves as a ready-made dealer stock (or could provide many hours of entertainment for an intrepid collector)