As the staff broke off into smaller groups Arthur saw that more regiments were following the example of the Fifty-first and going to ground, where they would be far less exposed to enemy fire. Turning his attention back to the situation around Hougoumont, he could see a French division forming up in front of the woods, ready to attack the moment their artillery ceased bombarding the chateau and its walled garden. Once the French infantry moved forward the allied guns on the ridge would be unable to fire on them for fear of hitting their own men.

The enemy artillery fire on Hougoumont gradually began to slacken and when the last of the guns ceased fire there was a brief pause before the French drums began to roll, beating an insistent rhythm, signalling the advance. The leading battalions of the division positioned in front of the chateau’s woods began to pace forward.

‘There are too few men defending Hougoumont, your grace,’ said Somerset. ‘They should be reinforced.’

Arthur shook his head. ‘They are adequate for the task.’

Somerset shot him an anxious look but Arthur did not react, and fixed his attention on the action beginning down the slope. The leading French formations disappeared from sight as they entered the trees and an uneven crackle of musketry followed as the British skirmishers fell back towards the chateau. A moment later the first of the enemy reached the garden wall and began to clamber over. The defenders, spread thinly along the wall, did their best to hold the perimeter, but were forced to give way as the French climbed over, or scrambled through the gaps smashed through the wall by artillery fire. The blue-coated attackers quickly spread out across the gardens and approached the chateau and its outbuildings. Sparks of fire and puffs of smoke erupted from windows and loopholes as the defenders opened fire on the French infantry pressing in from two sides.

The enemy had reached the chateau more quickly than Arthur had anticipated and he feared that Somerset might be right. Nudging his spurs in, he trotted over to the commander of a battery of howitzers of the Royal Horse Artillery that stood limbered up and ready to move.

‘Major Bull, isn’t it?’

The battery commander saluted. ‘Yes, your grace.’

‘I need the services of your battery. Follow me.’ Arthur turned and trotted down the slope towards the chateau. Bull and his howitzers followed, the gun carriages rumbling over the ground. Arthur drew up a hundred yards from the chateau. From the far side the din of the desperate struggle filled the air. ‘Have your howitzers fire over the chateau. We must take the pressure off the defenders. But be sure to get the range right, Major.’

‘Yes, your grace. I understand.’