Carpenter & Co.’s Kennebec Express, Mosher CPNX-L2, Black on Magenta Label on Folded Letter from Augusta, ME to Boston

Black on magenta circular label reading "Rail Road Exchange, Carpenter & Co. Kennebec Express, Court Square, Boston" affixed to folded letter addressed to Silas Peirce & Co., Boston. Manuscript "$100" at upper left and "25" at right. Letter contains an order for food supplies, likely placed by a store.