Beginning at the right bank of the Meuse, a vast plateau of bare, desolate moorland sweeps eastward to the Moselle, and descends to the river in a number of great, wooded ridges perpendicular to the northward-flowing stream. The town of Pont-à-Mousson lies an apron of meadowland spread between two of these ridges, the ridge of Puvenelle and the ridge of the Bois-le-Prêtre. The latter is the highest of all the spurs of the valley. Rising from the river about half a mile to the north of the city, it ascends swiftly to the level of the plateau, and was seen from our headquarters as a long, wooded ridge blocking the sky-line to the northwest. The hamlet of Maidières, in which our headquarters were located, lies just at the foot of Puvenelle, at a point where the amphitheater of Pont-à-Mousson, crowding between the two ridges, becomes a steep-walled valley sharply tilted to the west. The Bois-le-Prêtre dominated at once the landscape and our minds. Its existence was the one great fact in the lives of some fifty thousand Frenchmen, Germans, and a handful of exiled Americans; it had dominated and ended the lives of the dead; it would dominate the imagination of the future. Yet, looking across the brown walls and claret roofs of the hamlet of Maidières, there was nothing to be seen but a grassy slope, open fields, a reddish ribbon of road, a wreck of a villa burned by a fire shell, and a wood. The autumn had turned the leaves of the trees, seemingly without exception, to a leathery brown, and in almost all lights the trunks of the trees were a cold, purplish slate. Such was the forest which, battle-areas excepted, has cost more lives than any other point along the line. The wood had been contested trench by trench, literally foot by foot. It was at once the key to the Saint-Mihiel salient and the city of Metz. The Saint-Mihiel salient--"the hernia," as the French call it--begins at the Bois-le-Prêtre. Pivoting on The Wood, the lines turn sharply inland, cross the desolate plateau of La Woevre, attain the Meuse at Saint-Mihiel, turn again, and ascend the river to the Verdunois. The salient, as dangerous for the Germans as it is troublesome for the French, represents the limit of a German offensive directed against Toul in October, 1914. That the French retreated was due to the fact that the plateau was insufficiently protected, many of the regiments having been rushed north to the great battle then raging on the Aisne. Only one railroad center lies in the territory of the salient, Thiaucourt in Woevre. This pleasant little moorland town, locally famous for its wine, is connected with Metz by two single-track railroad lines, one coming via Conflans, and the other by Arnaville on the Moselle. At Vilcey-sur-Mad, these lines unite, and follow to Thiaucourt the only practicable railroad route, the valley of the Rupt (brook) de Mad.