The French bugles sounded the charge and the cuirassiers let out a roar as they spurred their big horses on. They swept through the dispersing smoke, swords and breastplates gleaming in the sunlight, and then slashed left and right as they cut down the fleeing Dutch soldiers. A short distance beyond, Arthur saw the Brunswickers halt and try to deploy, but they were thrown into confusion as the Dutch rushed amongst them, swiftly followed by the French cavalry, and then the Brunswickers were fleeing as well.

‘Your grace!’ Somerset shouted a warning and pointed as one of the cuirassier squadrons began its charge down the length of the remaining Dutch brigade. Arthur saw the danger and called to the Prince of Orange. ‘Your highness, follow me!’

The three officers turned their mounts and spurred them down the rise towards the line formed by Picton’s division. The remaining Dutch troops, caught between the infantry emerging from the wood and the cavalry charging their flank, turned and ran. The air was filled with the sound of horses’ screams and the irregular pop of muskets as Arthur urged his mount on. Ahead lay the Highlanders, two deep, front rank kneeling as they advanced their bayonets to receive the cavalry charge. With an icy stab of realisation, Arthur saw that he and the others were in immediate danger of being impaled on those bayonets.

Cupping his hand to his mouth he bellowed as loudly as he could, ‘Ninety-second! Lie down!’

Even though the order was not in the manual, the nearest men had sufficient presence of mind to throw themselves flat, and the horses of the three officers leaped over the Highlanders. As Arthur reined in and turned his mount round the men rose to their feet to face the oncoming cuirassiers.

‘Hold your fire until I give the order!’Arthur shouted, ignoring Picton’s angry expression at his commander’s presumption. ‘Wait . . .Wait . . .’

The men held their muskets tightly into their shoulders, stilling their breath in anticipation. The enemy, having cut down the Dutch, now pounded on towards the redcoats, so close that their savage expressions were clearly visible. At no more than thirty yards Arthur shouted the order. ‘Fire!’

The volley crashed out and from the saddle Arthur saw the leading Frenchmen and their mounts pitch forward in a tangle of arms, legs and horseflesh. Those behind had to swerve aside or rein in and the impetus of the charge was broken. A second volley cut down another score of cuirassiers and then they turned and cantered away, back towards the rise where the Dutch brigades had once stood.

Arthur glanced round and saw that the arrival of fresh troops had stabilised the allies’ position and the French cavalry were in retreat. But already another danger was evident as the first French guns unlimbered to his front. Within fifteen minutes the first cannon balls were pounding the allied line.

For the next two hours the French made several more attacks. But all the time more allied units and guns were arriving from the direction of Brussels and gradually the battle swung in Arthur’s favour. In the approaching dusk the allied line pressed forward, retaking the ridge and farmhouses while the light infantry cleared the French skirmishers out of the woods. As night fell the final shots were fired and then the battlefield was quiet, save for the groans and cries of the wounded.

While more formations continued to arrive, including his headquarters staff, Arthur was growing increasingly concerned by the lack of news from Ligny. The last report from the Prussian headquarters, received at five o’clock, had informed him that Blьcher’s men were holding their positions.

‘In that case,’ Arthur told his aide, ‘we shall be in an advantageous position tomorrow. Once we combine with Blьcher we are sure to overwhelm the enemy.’

‘Assuming Blьcher has held them off.’

‘Of course. But we must be certain.’ Arthur called over one of his staff officers. ‘Colonel Gordon! Over here, if you please!’

The colonel trotted over as Arthur mentally composed his orders before he spoke. ‘You have a fresh horse?’

‘Yes, your grace.’

‘Then I want you to ride to Marshal Blьcher’s headquarters at Sombreffe, north of Ligny. Tell him that we have the crossroads and by dawn the army will be here in sufficient strength to march to join him. Also, I would appreciate a report on his engagement today.’

‘Yes, your grace.’

‘Then off you go. You may find me here when you return.’

Colonel Gordon disappeared into the night, galloping along the road to Sombreffe, and Arthur stretched his shoulders for a moment before settling down by one of the camp fires of the Ninety-second to await his return. The long hours of the night passed without incident as more soldiers arrived at the crossroads and were led to their positions by staff officers. At first Arthur’s spirits were high. It had been touch and go the previous afternoon, but his men had bested the enemy. Even if Blьcher had not won at Ligny, he would be near enough for the armies to combine in the coming day. However, there was no sign of Gordon during the night, and as the first light appeared on the horizon a building sense of foreboding began to gnaw at Arthur’s heart. The sun rose, bathing the rolling landscape in a warm rosy hue. From the south came the faint sounds of trumpets as the French stirred, but there was no attempt to renew the previous day’s fighting.

Finally, at half past seven, Colonel Gordon returned. His horse was blown, its bridle covered in foam, and Gordon’s face looked gaunt as he dismounted and strode up towards Arthur.

‘Well?’

‘If you please, your grace, might we speak out of earshot of the others?’

Arthur frowned, but paced a short distance away from the headquarters staff, who exchanged a mixture of curious and anxious expressions.

‘Blьcher was defeated yesterday, your grace.’ Gordon spoke softly. ‘Many of his formations were routed. The rest were forced to retreat.’

‘I see.’ Arthur felt his heart sink as he digested the news. ‘Then I take it he is no longer at Sombreffe.’

‘No, your grace. He has pulled his army back to Wavre. That’s why it took me so long to find them.’

‘Wavre?’ Arthur was momentarily stunned. ‘But that’s nearly twenty miles from here. By God, we are undone,’ he continued in a hushed tone as the full implication of the news struck home. Blьcher was powerless to intervene if the French attacked Arthur’s army at Quatre Bras. Taking a deep breath, Arthur patted Gordon on the shoulder. ‘My thanks to you. I suppose in England they will say we have been licked. I can’t help it; as the Prussians have gone back, we must go too.’ He shook his head sadly. ‘Find yourself some refreshment. But first, send General Mьffling to me.’

‘Yes, your grace.’

While he waited for the Prussian liaison officer Arthur glanced to the south and east, as if expecting to see the leading formations of the French army already advancing to attack him and seal their victory.

Mьffling came up, hurriedly fastening his jacket buttons. ‘You sent for me?’

‘Yes. It seems that your countrymen were defeated yesterday.’

The Prussian’s jaw sagged in dismay. ‘I had not heard.’

‘That is because we were not told,’ Arthur responded coldly.‘Blьcher has retreated to Wavre. Yes, Wavre. More than a day’s march from here. And his chief of staff did not think to inform us of his reverse at Ligny. For what reason, I wonder? A suspicious mind might conclude that we had been left here, unaware, in order to cover the Prussian retreat.’

Mьffling froze and then shook his head.‘That is an ignoble suggestion, your grace.’

‘Perhaps. And if I am mistaken, then I apologise,’ Arthur replied flatly. ‘But the fact remains, my army is in an exposed position. I will have to withdraw. I want you to ride to Blьcher at once. Tell him that I will fall back to a position parallel with his at Wavre.’ Arthur closed his eyes and imagined the map of the surrounding landscape. He nodded. ‘Tell Blьcher I will make my stand at Mont-St-Jean, if he can promise me the support of at least one of his army corps.’