The camp of Pont-de-Bonn in the commune of Modave (Namur) very much resembles in its arrangement that of Hastedon.4 A mound stands out upon the plain protected on the north and west by rocks difficult of access and connected with the main plateau by a very narrow tongue of land. Outside we can make out regular trenches parallel with each other, and connected by a wall of masonry, at the foot of which wall were picked up a good many iron nails. Inside the _enceinte_ itself worked flints were associated with Roman coins. Are not these proofs in the first place of a long Neolithic occupation, then of the residence of Gallic Romans, and yet later of even more modern people of whom the masonry walls and iron nails are relics? Limburg also contains some defensive works, many centuries old, which are as yet but little known. We may mention amongst them the so-called dyke of Zeedyck, near Tongres, a formidable intrenchment some 2,186 yards long by more than 325 feet wide at the base, and of a height varying from 49 to 65 feet; the earthen ramparts of Willem on the Geule, the not less important ones of Houlem, with many others far away from the great highways of communication, but within the limits of the two provinces of Liège and Limburg.5 A few years ago Bertrand said that there are in France some four hundred earthen _enceintes_, only sixty of which contain relics connecting them with the Gallic Romans. Since Bertrand’s announcement this number has been greatly increased, thanks to eagerly prosecuted local researches. De Pulligny mentions a hundred in Upper Normandy6; Martinet says they are very numerous in Berry; one of the most remarkable, the quadrilateral of Haute-Brenne, covered an area of nearly three thousand acres.7 Amongst the forests on the Vosges Mountains were discovered long single and double walls, the course of which follows the crest of the ramparts overlooking the valley of the Zorn, between Lutzelbourg and Saverne.8 At Rosmeur, on Penmarch Point (Finistère), Du Chatellier excavated two tumuli which appear to have been connected with a series of defensive works encircling the whole promontory.9 It would be merely fastidious to multiply instances, we will content ourselves with describing a few of the most interesting of these antique fortifications.10