_All that is left of an emplacement of the "Grosse Bertha," one of the guns in the St. Gobain Forest between La Fère and Laon, which shelled Paris from a distance of about seventy-four miles._] [Illustration: _PLATE LXXV._ THE ST. GOBAIN FOREST. _The St. Gobain Forest was in German hands throughout the war; the photograph shows a German O.P. in a tall tree on high ground which would command the Oise valley in the direction of Chauny._] [Illustration: _PLATE LXXVI._ NOYON. _The fine twelfth-century Cathedral of Noyon is even more entirely ruined, throughout much of its length, than the Cathedral of Soissons, and very much more than Rheims._] [Illustration: _PLATE LXXVII._ MONTDIDIER. _This little town was the farthest south point reached by the Germans in their Somme advance of 1918. It lies on the Doms, which is practically a continuation of the Avre._] [Illustration: _PLATE LXXVIII._ THE AVRE VALLEY. _The chalk here, just below Moreuil, is so near the surface that the shell-holes still looked like snow patches more than a year after they had been formed. The ground shown is that of the French counter-attack (with English tanks) a few days before the advance on the Somme in August, 1918._] [Illustration: _PLATE LXXIX._ CAMBRAI PLACE D'ARMES. _A portion of the Place d'Armes in Cambrai, burnt deliberately by the Germans in their final evacuation, after there had been time to clear away the débris with which it had been covered._] [Illustration: _PLATE LXXX._ CAMBRAI CATHEDRAL. _The tower of the modern Cathedral of Notre Dame at Cambrai appears to stand, in its upper part, in defiance of all theories of stable construction in masonry._] X.--CAMBRAI TO ST. QUENTIN (PLATES 79 TO 87.)