Nice set of 4 Balloons, the 1st franked with N°37 "20c Siège" for Rennes and forwarded to Spain (Taxe 12 in red), by General Cambronne. Then we have 2 Victor Hugos franked for Rennes, but above all a letter entrusted (also by the Victor Hugo) with a rare red stamp on the reverse by the Aerostiers (Nadar, Dartois, Duruof), from the same archive as the two previous letters.