The artillery teams dragged the mortars up to the fortified pits that Reynier’s men had prepared for them. Napoleon joined the crews as they wrestled the awkward timber carriages into place and unloaded the shells and propellent charges. It was hot, exhausting work and the battery was not ready to open fire until late in the evening. There was still plenty of light cast by the moon, and the range had already been calculated by Reynier’s artillery commander, so Napoleon gave the order to start the bombardment. The first mortar fired with a booming thud and the flash from the muzzle briefly illuminated the crew and the surrounding pit in a lurid orange glow, then all eyes snapped forward towards the fort. There was a short delay before the rampart was lit up by a brilliant flash inside the fort and a moment later the crash of the detonation carried across the intervening ground, slightly deadened by the sand.

‘The range is good!’ Napoleon called out. ‘All mortars - open fire!’

The bombardment continued through the night and into the following day in a steady rumble of explosions that soon shrouded the fort in a thick cloud of dust, illuminated from within by the blooms of exploding shells. Hour after hour the bombardment continued and still the garrison showed no sign of surrendering. Napoleon sat on a rock and watched the shelling continue for another night. In between fitful snatches of sleep, he stood up and walked swiftly to and fro behind the battery, fretting about the delay this siege was causing to his advance on Acre.

As the sun rose out of the desert on the following morning, one of the gunners shouted out to Napoleon and pointed towards the fort. The gate had opened and two men made their way outside. The gate was hurriedly closed behind them, just as the last shell to be fired went off a short distance beyond the wall. The two figures threw themselves flat.

‘Cease fire!’ Napoleon bellowed. ‘Cease fire!’

In the silence the two men warily rose to their feet; then there was a glint as one of them raised a trumpet to his lips and blasted out three notes.The other unfurled a small white flag and held it up in clear view as they advanced across the open ground in front of the fort.

Reynier came trotting up to Napoleon with an excited expression. ‘Looks like they have had enough, sir.’