cover MPC-1aR: 1857 (11 Oct.) entire letter to Patras, rated "6" and "45" in red and showing a good strike with oval-framed "P." in black (crossed by filing crease); MPC-1bR: 1844 (28 Sept.) entire letter (light filing creases) to Cephalonia, rated "3d" and "5", and showing a fair strike at upper right