die cut, tied by black "Boyd's City Express Post" oval to all-over advertising cover for William L. Purdy & Co. ("silks, shawls, cloaks, dress goods, linen, embroideries, and dry goods generally") with additional printed ad inside, two-line "Collect 1 Cent." handstamp, locally-addressed, vertical creases through stamp, otherwise very fine appearance, due 1c because rate for intra-city delivery was 2c (Scott $250)