‘How the hell . . .’ Arthur began before he realised they must have been feigning death when the British line swept over them. Some Mahratta horsemen had also managed to work their way round the right flank, no longer covered by Maxwell’s cavalry, and were helping to serve Scindia’s guns. As Arthur looked, another gun fired, and this time the shot was true and cut down two men at the corner of the square as it tore through their chests and flung the bloody remnants at the feet of their comrades.

There were only two formations ready for action, Arthur realised. The 78th and the 7th Native cavalry in the reserve. He turned Diomed about and galloped back across the field of bodies to Colonel Harness.

‘We have enemy to the rear!’Arthur gestured back towards the guns.

‘I wondered what the noise was.’ Harness frowned. ‘But those guns were taken, sir.’

‘Evidently not. We’ll have to do the job again. Get your men back there as quickly as possible.’

‘Yes, sir.’

Arthur left the colonel to bellow his new orders and galloped back across the rear of his re-forming infantry battalions to the cavalry reserve, still behind the rise that the rest of the army had crossed just over an hour earlier. Explaining the situation to the regiment’s colonel, Arthur took over the command and ordered the regiment to form a line. As the manoeuvre was complete he ordered the men forward. They crested the rise and Arthur saw the 78th marching towards them. In between the two British forces Scindia’s men were firing their guns with the same dedicated efficiency as they had before, bombarding the remains of the 74th as that regiment fell back towards Assaye.

Drawing his sabre, Arthur indicated the guns and gave the order to increase pace to a trot as they flowed down the gentle slope towards the Mahrattas. They were spotted at once and the horsemen abandoned their guns and ran for their mounts, leaving the gunners to snatch up whatever weapons they could as the British converged on them. Once they had closed to within the last three hundred yards of the line of guns, Arthur shouted the order to charge. Diomed’s hooves drummed on the baked ground beneath him and her mane flickered in the wind and Arthur felt his heart pounding like a hammer as the cavalry thundered towards the enemy.