group of 14 covers and cards including "N. Western Tube Sta." duplex on 1910 special delivery cover, same cancel on incoming 1909 Egypt postcard, four-line "Returned for Postage Northwestern Oct 9 1911" handstamp, bogus three-line "N. Western Tube Sta. Transit" handstamps, and several "La Salle St. Tube Sta." duplex cancels, also a small group of 1960s "City Press Assn. Pneumatic Tube System" covers, generally fine to very fine, an interesting group