This map was produced by Alfred Caraven. It was sent to the Commission de Topographie des Gaules by Abbé Cochet. On the map, this Tarn correspondent identifies himself as “attaché à la Commission de Topographie des Gaules”. By using different colours, he manages to provide information about the region’s successive periods of occupation in one document.
Vist the site : Aux sources de l'Archéologie nationale