He was about to turn away when there was a sudden crackle of musket fire from close by. The two officers looked towards the sound. To their left the Portuguese were firing along the cobbled road as it bent round the corner. More shots were fired, this time to their right. Then there was a shout and the sound of boots echoing off the fortress walls and Arthur saw the first of the Frenchmen appear along the road. More came, filling the gap between the walls as they charged forward, pausing only to fire at the Portuguese troops in their way.

Perkins cupped a hand to his mouth and bellowed, ‘To arms! To arms! The Frogs are sallying!’ He turned to Arthur. ‘You’d better go, sir. Get back to the support trench and order some reinforcements up here.’

Arthur shook his head as he stood up. ‘No.’

Perkins reached inside his coat and pulled out a pistol. ‘As you will, sir.’

All around the breach, the men who had been working to clear the rubble scrambled for their weapons and rushed forward, past Arthur. There was a brief skirmish as the Portuguese company tried to hold their ground, thrusting their bayonets and clubbing the butts at the Frenchmen, but there were too many of the enemy and they were quickly swept aside and cut down before the French closed in on the breach from both sides. Perkins and his men rushed forward. Most had muskets, but some had snatched up shovels instead and now wielded them like hatchets. It was close work, and bloody, with no time for mercy. Arthur saw Perkins raise his pistol and shoot a Frenchman in the face, blowing out the back of his skull in a shower of blood, brains and bone fragments. Arthur felt a surge of fear as he realised he was unarmed. Looking round he saw a musket leaning against the outside of the wall and scrambled across the rubble to snatch it up, hoping that it was loaded. By the time he got back to the breach, his men were already being pressed back through it, as hundreds of Frenchmen surged forward. He saw Perkins double over as a bayonet plunged into his chest, piercing him through.

‘Get back!’ a voice called out. ‘There’s too many of ’em. Fall back!’

The soldiers gave ground, carrying Arthur with them. They reached the trench as the first of the enemy emerged from the breach, led by a huge officer with a thick moustache. He bellowed at them to charge, and kill all in their path. His men plunged towards the trench, driving the British back. Arthur had already been thrust some distance and turned to make his way down the slippery trench towards the camp. Then he saw a young lieutenant, wide-eyed with terror, pressed against the side. Arthur grabbed him by the arm.