Here is a 1702 letter to Avignon. As was the custom before the 1760s in Europe and the European colonies, there is no postmark. This letter, although most likely mailed by some sort of a commercial enterprise, is from before the establishment of central government post offices. The letter is of a commercial nature (notice the sum of two quantities on the first page). Quick links: main page / 1702 letter to Avignon / 1791 letter from Marseilles to St. Gilles / 1820 letter from Amiens to Paris / 1827 letter from Aurillac / 1812 letter from Angers / 1829 letter from Troyes to Saint Dizier