Unpaid single weight letter docketed St. Thomas 12. July 1873 to Genova, Italy. With RMS ELBE to London, then forwarded to Italy in the closed mails through France. Upon arrival in Genova, a collection of 17 decimi was required to pay the Italian internal postage, included the 14½ decimi fee to England. Under terms of the Anglo-Italian Convention, the postage due to Great Britain was a combination of the 1 sh. (12 decimi) per ¼ ounce British transatlantic packet service and transit fee to France, plus the 1 Franc per 30 gram (25c per 7½ gram) closed mail transit fee through France to Italy, for a total of 14½ decimi. Added to this amount was 20 centisimi per 7½ gram Italian internal postage, and the total was rounded up to 17 decimi.