49 covers from about 1863 to 1890, note better including "Chicago Ill RA Sep 15" initial postmark on cover with "Due 6" handstamp, legal-sized cover with oval "West Branch P.O." and large "Due 6", and various other early markings including DU-8, DU-10, DU-11, DU-18, and more, some small faults but generally fine to very fine, a wonderful group, refer to Piszkiewicz Chapter 51 for more information