cover 3c Dull Red (11), ample margins to slightly in at top, tied by blue "Philadelphia Pa. Dec 29" c.d.s. on fresh blue folded letter to Middlebury, Pa., red star h.s. (Carrier) cancel, also small ornate "Paid" in black on bluish wove label, a possible "private" or "unofficial" Carrier label, very fine, an interesting and very unusual Carrier usage worthy of further research photo