Adams & Co.'s Express/Don Pedro's Bar. Blue oval handstamp with "Sept 17" manuscript date and indistinct "Adams Sacramento" blue double circle handstamp on stampless cover to California State Assembly and then State Senate member James W. Mandeville, addressed originally to Don Pedro's Bar, then forwarded to Sonora, and then forwarded again to Columbia where evidently delivered, light staining, F.-V.F., a very rare Adams marking, Cover illustrated in Coburn's Letters of Gold (page 172). Estimate  $300 - 400. $0 (Image)