Returning to the south, let him note a river rising immediately to the west of Charleroi, the Haine, which joins the Scheldt at Tournay, and let him draw a line from Tournay westward through Lille and Ypres to the sea at Dunkirk. Let this line from Dunkirk to Charleroi be carried eastward to Namur; and there is his southern boundary. His western boundary, is, of course, the sea. Within this quadrilateral, Antwerp (or more strictly speaking the mouth of the Scheldt), Dunkirk, Namur, and Maestricht, lies the most famous fighting-ground of Europe. Glancing at it on the map, the reader will see that this quadrilateral is cut by a number of rivers running parallel to each other from south to north, and flowing into the main streams of the Demer and the Scheldt. The first of these, beginning from the east, are the Great and Little Geete, which become one before they join the main stream. It is worth while to pause for a moment over this little slip of land between the Geete and the Meuse. We shall see much of Namur, Huy, Liège, and Maestricht, which command the navigation of the greater river, but we shall see still more of the Geete, and of two smaller streams, the Jaar and the Mehaigne, which rise almost in the same table-land with it. On the Lower Jaar, close to Maestricht, stands the village of Lauffeld, which shall be better known to us fifty years hence. On the Little Geete, just above its junction with its greater namesake, are the villages of Neerwinden and Landen. In the small space between the heads of the Geete and the Mehaigne lies the village of Ramillies. For this network of streams is the protection against an enemy that would threaten the navigation of the Meuse from the north and west, and the barrier of Spanish Flanders against invasion from the east; and the ground is rich with the corpses and fat with the blood of men. The next stream to westward is the Dyle, which flows past Louvain to the Demer, and gives its name, after the junction, to that river. The next in order is the Senne, which flows past Park and Hal and Brussels to the same main stream. At the head of the Senne stands the village of Steenkirk; midway between the Dyle and Senne are the forest of Soignies and the field of Waterloo. Here the tributaries of the Demer come to an end, but the row of parallel streams is continued by the tributaries of another system, that of the Scheldt. Easternmost of these, and next in order to the Senne, is the Dender, which rises near Leuse and flows past Ath and Alost to the Scheldt at Dendermond. Next comes the Scheldt itself, with the Scarpe and the Haine, its tributaries, which it carries past Tournay and Oudenarde to Ghent, and to the sea at Antwerp. Westernmost of all, the Lys runs past St. Venant, where in Cromwell's time we saw Sir Thomas Morgan and his immortal six thousand, past Menin and Courtrai, and is merged in the Scheldt at Ghent.