Bidspirit auction | Postal history. Letter sent from

Postal history. Letter sent from Lisbon on 9.8.1869, via London 12.8, by unknown ship to New York, 23.8. Arrival postage 33 cents. Attempt to calculate American postage: (22 cents (1/4 rate + fine 5c = 27 cents in currency, equivalent to 33c in notes.