ADAMS & CO. EXPRESS, J.M. FREEMAN AGT., PANAMA, CLEAR FORWARDER'S MARKING IN A SCALLOPED OVAL, ON BROWN COVER ADDRESSED TO STEAMER 'COLUMBUS', AT PANAMA 'OR TOBOGA', LIGHT EDGEWEAR, STILL FINE, VERY SCARCE, THIS MARKING RECORDED IN THE AMERICAN STAMPLESS COVER CATALOG IN 1854 ONLY, FREEMAN'S OPERATED UNDER THEIR OWN NAME AFTER ADAMS & CO. CEASED OPERATIONS IN 1855, THE STEAMER 'COLUMBUS' PLIED THE PANAMA-SAN FRANCISCO ROUTE