three items, first November 16, 1848 folded letter from Liverpool to Andover, Massachusetts, franked with Great Britain 1sh Green, endorsed "per Britannia", red "Boston Ms. Ship Dec 6" datestamp and matching "29" rate; second December 1, 1848 folded lettersheet from London to Philadelphia, franked with Great Britain 1sh Green, endorsed "pr. Niagara", red "Boston Ms. Ship Dec 18" datestamp and matching large "34" rate; third August 26, 1848 folded lettersheet from Liverpool to Baltimore, franked with Great Britain 1sh Green, endorsed "p Hibernia", red "Boston Ms. Ship Sep 8" datestamp and matching small "34" rate, very fine group showing three different retaliatory rate handstamps