INTERMEDIATE SERVICES (1852-1854):
The conveyor-mail post originally implied simple tasks like the management, custody and exchange of letters bundles (dispatches) during the station stops.Apart from their role of carrier They therefore intervened in any way in the mail checking. A square was specially allotted to them in a passenger car (they had no dedicated car as street).
From January 1852, the Postal Service will ask the mail-conveyors circulating on lines from Paris to Strasbourg (until September 1853), Paris to Troyes and Paris to Lyon (until August 6, 1854 for the latter) to treat their letters that are given from hand to hand during their journey as well as the dispatches they support.For this, special date on their stamps are then allocated.
It is rare taxed folds and obliterated the front (to mark the origin of their support), and more often letters handled transition and thus marked on the reverse. It is also possible that some stamped folds were directly given to these conveyors haul and have canceled their stamp date stamp (if exists, rare).
Letter of 2 September 1853 taxed at 25c, Nanteuil Meaux. date stamp of Paris Services Providers in Strasbourg. The mail-conveyor received the fold, the taxed 25 cents in force and has put his special stamp on the front of it as original brand.
On the back the date stamp return of Strasbourg Intermediaries Services in Paris. This fold was distributed on the service return to Paris, the conveyor-mail service on the convoy was also treated but in passing.