Tunis: 1856, letter sheet from Tunis to France, franked with 1853 Napoléon imperforated 20 c. blue in a left marginal horizontal strip of three, touched in two places but generally good to large margins, tied by PC "3716" of Bone with adjacent "TUNIS 17 SEPT. 56" (Pothion = 21 points) and framed "P.P." in red, reverse with Bone Algerie, Marseille & Montpellier transit and St. Pons arrival (Sept 26) cds's. Charge '4' décimes due upon arrival. A scarce and attractive item; signed Calves; cert. Roumet (1998). Note: Adhesives on mail from Tunis were cancelled in Bone, Algeria with the Petits Chiffres '3716' or Gros Chiffres '5015', respectively in the years between 1852 and 1862. In 1863 Tunis became a Bureau de distribution and received its own Gros chiffres '5107'.