folded letter datelined "Buenos Ayres Abril 27 1859", sent to New York City via London, by RMSP's Camilla and Tamar (short-lived 6d per ½oz rate to United Kingdom), then by Kangaroo departing Liverpool June 8 and arriving New York June 21, black "New-York Am. Pkt. Jun 22" handstamp and "33" rate, very fine