Mokelumne Hill, Cal, Aug 28, ca 1854 (Calaveras). Straight line (31 mm x 3mm) postmark (Williams-CAL-1620) onstampless cover to Ames, N.Y. with matching handstamped "10" rate marking, refolded ¼ inch at right, Very Fine, earliest known and best strike of all the Mok Hill straight lines, two are currently recorded. Estimate  $1,000 - 1,500. $0 (Image)