Sharpe turned onto the main highway. The paved surface was firmer; a causeway out of disaster. The hooves of those cavalry horses who struggled northwards in the flanking fields were clubbed with earth; proof that no gun would escape unless it reached the road.
“Move! Move! Move!” Gunners whipped their horses up from the fields onto the road that was swimming with a chalky white effluent. The horses strained, seemingly sensing their masters` panic caused by the near presence of enemy lancers. Men glanced behind into the storm-blotted landscape, then whipped at the gun teams till at last the horse artillery was clear of Quatre Bras and galloping northwards with blood dripping from the horses’ whipped flanks and water spraying silver off the gun wheels. Sharpe, Harper and Doggett raced with them.
Miraculously no gun was lost. The mad charge was checked at the village of Genappe where the road narrowed as it twisted between the thatched cottages. The delay gave the French pursuit a chance to catch the rearmost guns, but a regiment of British Dragoons turned and charged the Lancers. More French cavalry spurred forward and it took an assault by the heavy Life Guards, the sovereign’s own escort, to drive the Frenchmen away. The Life Guards, scarlet coated and wearing black and gold Grecian cockscomb helmets, hammered at the enemy with their ungainly heavy swords. The sheer weight of the heavy cavalry drove the lighter French horsemen back, giving the guns time to thread the narrow village street.
North of Genappe the French pursuit seemed to lose its ferocity. The rain also slackened, though it was still heavy. Every mile or so the British guns would stop, unlimber, fire a few rounds at their pursuers, then gallop on. The French were never far behind, but did not press home. The British cavalry, Dragoons and Life Guards, hovered on the flanks. Every few moments, when a French squadron trotted close, the British would advance, but each time the French declined to fight. Sharpe was amused to see that if a Life Guardsman tumbled from a slipping horse the man would remount, then hide his soiled uniform in the rear rank of his troop, just as if he was on parade in Hyde Park.
The French managed to bring up some of their own light eight-pounder cannons that opened fire with roundshot. The small cannon-balls fountained a slurry of mud and water wherever they landed. The mud was saving the retreat, not only soaking up the power of the French roundshot, but forcing the French cavalry to stay close to the high road. If the land had been dry the quick light enemy horse could have raced far round the British flanks to come slashing in with lance and sabre on the struggling column, but the mud and rain held them back.
Another weapon came to the British aid. A sudden crashing hiss made Sharpe twist round to see a rocket being fired. He had fought with rockets in Spain, but familiarity did not blunt his fascination with the odd weapon and he watched enthralled as the ungainly missile hurled itself forward on its pillar of flame that scorched the long stick that gave the rocket its balance. Doggett, who had never seen the new and mysterious weapon, was impressed, but Harper shook his head scornfully. “They’re guaranteed to miss every time, Mr Doggett. You just watch.”
The first rocket arched in fire across the damp valley to leave a serpentine trail of smoke. The missile fell towards the French guns, then the fuse inside its head exploded and a rain of red-hot shrapnel crashed down to slaughter every man in a French gun crew.
“Good God Almighty,” Harper said in astonished wonder, “the bloody thing worked!”
Encouraged by their success, the rocket artillery fired a whole barrage. Twelve rockets were fired from twelve metal troughs angled upwards on short legs. The rockets’ fuses were lit, then the rocketmen ran for cover. The missiles began to spew flames and smoke. For a few seconds they quivered in their firing troughs, then one by one they shot up into the wet air. They wobbled at first, then their acceleration hurled them on. Two streaked straight up into the clouds and disappeared, three dived into the wet meadow where their rocket flames seared the wet grass as the missiles circled crazily, five went vaguely towards the French but dived to earth long before they did any damage, and two circled back towards the British cavalry who stared for a second, then scattered in panic.