(G.H.) Wines & Co.'s Express. straightline handstamp between two bars, full clear strike, "Republica de Nicaragua" double oval handstamp and 3c Dull Rose (11) tied by New York Mar. 14 datestamp on small 1856 cover to Boston Mass., with original enclosure datelined "Granada Feb. 29, 1856", an autograph letter signed by William Walker, the famous "filibuster" who organized the invasion of Nicaragua in May 1854 and became President of that country in June 1856 (three months after this letter was written), he and his mercenaries were shortly thereafter rescued by the U.S. government following strong Latin American and British action against this coup, Walker was executed by Hondurans in 1860 after another of his adventurous attempts to overthrow a government, in this letter Walker laments the loss of one of his best officers, very fine, a rare express company usage with fascinating historical ties, illustrated in Letters of Gold, ex Haas