The great Gallic league. J. Dassié. Page 19.
Localization of Lamnum
With this value, the various segments are articulatedlogically and we find a coherent distance between Blaye and Saintes.The only non definite point remains LAMNUM which itis easy to locate to 54 km of Blaye, and to 20 km to Saintes, i.e. just with PONS , centers significant convergence of ancient ways, in Charente Maritime, presents monumental vestiges.
Fig. 13. Checking of the localization of Lamnum by the method of the curvilinear rays.