unfortunately Andre passed away 16 month ago (he was only in his 50es - he died due to cancer).
This in one reason that there is no much traffic in this forum within the last 2 years.
I would be interested on the following letter due to the early date:
"Berlin to Bordeaux Aug 27th 1831 , which seems an early date, "Prusse par Forbach" entry"
Can you show us a picture of this letter. Thanks in advance.