slightly faded red handstamp on locally-addressed folded letter, red "Boyd's City Express Post July 7 12" oval alongside, letter datelined July 4, 1848, addressee's name removed, otherwise fine, the only known conjunctive use between Boyd's and Hanford's, apparently the cover was given to Hanford's in New York City on July 4 and when they were unable to deliver it they gave it to Boyd's three days later, a great local post rarity