Page:A book of the Cevennes (-1907-).djvu/23

Rh It seems therefore reasonable to take the entire curve as forming the Cevennes from the depression of the Jarrêt, through which runs the line from Lyons to the coalfields of S. Etienne, as the northern limit, and the Montagne Noire, east of the gap of Revel, by which the road by which Castelnaudary and Castres are linked, as the western termination.

The chain of the Cevennes, of which Mézenc may be regarded as the hinge, forms a ridge on the right bank of the Rhone, running for a while parallel to the French Alps upon the left bank. But whereas these latter