Hello all!
Since I collect US to Europe mail in the 1860's, I thought I would try to share some in these threads.
I figured out how everyone is putting attachments on the posts - I will fix the others if people feel that I should! I just missed the tabs at the bottom.
The France-US Convention ran from April 1857 to December 1869 and the postal fee was 15 cents (US) per 1/4 ounce or 7.5 grams.
This item weighed between 1/2 and 3/4 ounce (15 to 22.5 grams) and was a triple weight letter. It was prepaid 45 cents US with 1861 issue stamps. The red "45" handstamp indicates the amount due. The red pencil 36/3 indicates that 36 cents were credited to France for a triple (3) weight letter. 9 cents were kept by the United States for surface mail. France broke the 36 cents down by giving Britain 18 cents for the Atlantic packet and 6 cents for the transit from Britain to France. 12 cents remained for the French surface mail.
the letter started in Newport, Rhode Island on December 4, 1866 and went to the Boston exchange office. The Boston British Packet Paid marking showed that the US counted the letter as fully paid and that it would be carried on a British Contract ship across the Atlantic. The December 5 date indicates the scheduled date of sailing of the intended packet, which was the Cunard Line's Africa.
The Africa arrived at Queenstown on December 15 and then the ambulatory Calais post office on December 18. The letter likely took the Irish Mail train from Queenstown to the Holyhead and Kingston Packet as it went to London and then most likely Dover.
The French put a PD to indicate that they agreed the item was fully paid to destination. The red French transit receiver reads Et. Unis Serv Am Calais. Technically, this should probably read Serv Br, but I find that this part of the marking isn't consistent with the actual carriage of the mail.
There is a single receiver marking in Paris on December 18 on the verso.
Best,
Rob