While a portion of this force opposed Boufflers' troops pressing on their front, the rest threw themselves against those who barred their retreat to Fort Lille. Never was there more desperate fighting. Nowhere could ground have been selected more unsuited for a battlefield.

It was by the roads alone running upon the dykes above the general level of the country the troops could advance or retreat, and it was upon these that the heads of the heavy columns struggled for victory.

There was little firing. The men in front had no time to reload, those behind could not fire because their friends were before them. It was a fierce hand-to-hand struggle, such as might have taken place on the same ground in the middle ages, before gunpowder was in use. Bayonets and clubbed muskets, these were the weapons on both sides, while dismounted troopers--for horses were worse than useless here, mixed up with the infantry--fought with swords. On the roads, on the sides of the slopes, waist deep in the water of the ditches, men fought hand-to-hand. Schlangenberg commanded at the spot where the Dutchmen obstinately and stubbornly resisted the fury of the French onslaught, and even the chosen grenadiers of France failed to break down that desperate defence.

All day the battle raged. Rupert having no fixed duty rode backwards and forwards along the roads, now watching how went the defence against the French attack, now how the Dutch in vain tried to press back the Spaniards and open a way of retreat. Late in the afternoon he saw a party of the staff officers pressing towards the rear on foot.

"We are going to try to get to the head of the column," one said to Rupert. "We must force back the Spaniards, or we are all lost."

"I will join you," Rupert said, leaping from his horse.

"Hugh, give me my pistols and take your own; leave the horses, and come with me."

It took upwards of an hour to make their way along the dyke, sometimes pushing forward between the soldiers, sometimes wading in the ditch, but at last they reached the spot where, over ground high heaped with dead, the battle raged as fiercely as ever. With a shout of encouragement to the men the party of officers threw themselves in front and joined in the fray. Desperate as the fighting had been before, it increased in intensity now. The Dutch, cheered by the leading of their officers, pressed forward with renewed energy. The Spaniards fought desperately, nor indeed could they have retreated, from the crowd of their comrades behind. The struggle was desperate; bayonet clashed against bayonet, heavy muskets descended with a showering thud on head and shoulders, swords flashed, men locked together struggled for life. Those who fell were trampled to death, and often those in front were so jammed by the pressure, that their arms were useless, and they could do nought but grasp at each other's throats, until a blow or a bayonet thrust from behind robbed one or other of his adversary. Slowly, very slowly, the Dutch were forcing their way forward, but it was by the destruction of the head of their enemy's column, and not by any movement of retreat on their part.

After a few minutes of desperate struggles, in which twice Hugh saved his life by shooting a man on the point of running him through with a bayonet, Rupert found himself on the edge of the road. He drew out of the fight for an instant, and then making his way back until he came to a Dutch colonel, he pointed out to him that the sole hope was for a strong body of men to descend into the ditch, to push forward there, and to open fire on the flank of the enemy's column, so as to shake its solidity.

The officer saw the advice was good; and a column, four abreast, entered the ditches on each side, and pressed forward. The water was some inches above their waists, but they shifted their pouches to be above its level, and soon passing the spot where the struggle raged as fiercely as ever on the dyke above, they opened fire on the flanks of the Spaniards. These in turn fired down, and the carnage on both sides was great. Fresh Dutchmen, however, pressed forward to take the place of those that fell; and the solidity of the Spaniards' column being shaken, the head of the Dutch body began to press them back.