red rimless datestamp with matching "29" retaliatory rate due handstamp on folded letter from Halifax, Nova Scotia to New York City, red "Halifax Paid Oct 17 1848 Nova Scotia" datestamp and manuscript "1/-" packet rate, endorsed "pr Niagara", very fine, 29c represents the 24c penalty plus 5c postage to New York City, ex-Van der Linden, Mayer, and Walske