Coburg then judged it safe to proceed with the siege in earnest, and, withdrawing the covering army to the north, formed it in a huge semicircle around the besieging force. His left wing curved round from the heights that lie to eastward of Landrecies, and between it and the village of Maroilles, southward to Prisches, thence south-east across the Rivierette to Le Sart, and thence by Fesmy to the Sambre, the whole line being strongly entrenched, with several bridges thrown over the Rivierette. The force allotted for the defence of this tract was thirty-two battalions, fifty squadrons, and twenty-six light companies, the left under General Alvintzy, the right under General Kinsky. On the western bank of the Sambre the right wing completed the semicircle, with a total of twenty-six battalions and seventy-six squadrons. The first section of the defences on this side ran westward of Catillon to the Selle, from which stream the Duke of York’s army carried the line north-westward to the road from Le Cateau to Cambrai. This, a broad paved way, runs straight as an arrow over the long waves of rolling ground that lie between the two towns, the undulations rising to their highest at the village of Inchy, upon which the Duke rested his right. The position thus occupied by the Allies was over twenty miles in extent, following a chain of hills of easy slope but seamed to east of Catillon by deep watercourses and hollows, and broken by small copses and enclosures in the neighbourhood of the villages. Westward from Catillon, however, towards Cambrai the hills subside into a broad plain, not unlike Salisbury Plain, except that the undulations are far longer and the acclivities therefore less severe. Covered with crops but unenclosed, its gentle slopes and unseen folds present an ideal field for the action and manœuvres of cavalry. ◆April 23.◆