All was still. Overhead a bank of clouds had blocked out the stars and added to the pitch darkness that enveloped the fortress. Torches on the wall picked out some of the details of the defences and occasionally one of the French soldiers on watch. The only sounds came from the allied camp where a handful of drunken soldiers from two battalions were engaged in a brawl. The provosts would soon sort that out, Arthur reflected, but for now the noise would help to divert the attention of the defenders while the assault party edged as close to the mine as they dared.

‘Five past four,’ Somerset muttered. ‘The engineers are late.’

Arthur was about to reply when a jet of flame blasted out from the entrance to the tunnel leading under the wall, followed by a roar that echoed off the walls of the nearby town. After the sound died away there was a stunned silence before Arthur heard the crash and rumble of masonry as a section of the wall above the mine collapsed. At once there was a cry from Somers-Cocks. ‘Forward! Go forward!’

There was no cheer from the men of the assault party as they burst from the shelter of their trench and scurried up the slope towards the breach. A few muskets fired down at them from the nearest tower of the outer wall, but they charged on, clambering up the debris slope and into the breach. The sounds of fighting carried back to the command post as Arthur strained ears and eyes in an attempt to try to discern how the attack was progressing. Then there was a sudden lurid flare of white sparks as one of the assault party lit the small pot of powder that had been taken forward to act as the signal that the beach had been taken. At once the waiting support brigade rose up from where they had been concealed in the approach trenches and rushed towards the breach. The sounds of musket fire continued for the next half-hour before dying down to the occasional exchange of a handful of shots.

As the first light gathered on the horizon a runner came panting up the trench to the command post, his boots slipping in the glutinous mud that filled all the trenches.

‘My lord.’ He breathed heavily as he stood to attention. ‘Major Somers-Cocks begs to report that the breach has been taken, and his men are holding the flanks while the brigade invests the defences around the breach.’

‘Very good,’ Arthur felt the burden of anxiety lift from his shoulders. ‘Pass on my congratulations and my thanks to the major.’

‘Yes, sir.’

Once the man had slithered back down into the trench Somerset spoke. ‘Well, that was fairly straightforward, thank God.’

Arthur rubbed his aching eyes briefly.‘We have the breach, Somerset. That is all. You can be sure that Dubreton is already planning his counterstroke.’