P.H. Walker & Co. Printed corner card on lemon cover Importers and "Dealers in Fishing Tackles, Guns, Pistols, Powder, Shot, etc.", franked with 1857 3c tied by large Boston Paid cancel with red double circle postmark alongside, small mended cover tear at top (not affecting design), Very Fine, a nice early gun cover. Estimate  $50 - 75. $0 (Image)