(Mariposa) Hornitos, Cal., Jan. 2d, 1857, bold manuscript postmark (MAR-1000, R4) on double rate cover to Clinton, N.Y., franked with 1851, 10¢ green, types II-III, vertical pair canceled by manuscript "H"'s, Very Fine, a very scarce early double rate cover usage. Scott No. 14-15  Estimate $400 - 600. $0 (Image)