"Spaniard?" Sharpe wondered aloud.

"The dons are always gaudy, sir," Harper said. "The dons never did like dying in drab clothes."

"Maybe he's a partisan," Sharpe suggested.

"He's got Crapaud weapons," Price said, "and trousers." The pissing horseman was indeed armed just like a French dragoon. He wore a straight sword, had a short-barrelled carbine sheathed in his saddle holster and had a brace of pistols stuck in his belt. He also wore the distinctively baggy saroual trousers that the French dragoons liked, but Sharpe had never seen a French dragoon wearing grey ones, and certainly never a grey jacket. Enemy dragoons always wore green coats. Not dark hunting green like the coats of Britain's riflemen, but a lighter and brighter green.

"Maybe the buggers are running out of green dye?" Harper suggested, then fell silent as the horseman buttoned his floppy trousers and hauled himself up onto his saddle. The man looked carefully about the valley, saw nothing to alarm him and so spurred his horse back into the hidden side valley. "He was scouting," Harper said softly. "He was sent to see if anyone was here."

"He made a bloody bad job of it," Sharpe commented.

"Even so," Price said fervently, "it's a good thing we're going in the other direction."

"We're not, Harry," Sharpe said. "We're going to see who those bastards are and what they're doing." He pointed uphill. "You first, Harry. Take your fellows and go halfway up, then wait."

Lieutenant Price led the redcoats of Sharpe's company up the steep slope. Half of the company wore the red jackets of Britain's line infantry while the other half, like Sharpe himself, had the green jackets of the elite rifle regiments. It had been an accident of war that had stranded Sharpe and his riflemen in a redcoat battalion, but sheer bureaucratic inertia had held them there and now it was sometimes hard to tell the riflemen from the redcoats, so shabby and faded were their respective uniforms. From a distance they all looked like brown uniforms because of the cheap Portuguese cloth that the men were forced to use for repairs.

"You think we've crossed the lines?" Harper asked Sharpe.

"Like as not," Sharpe said sourly, still angry at himself. "Not that anyone knows where the damn lines are," he said defensively, and in part he was right. The French were retreating out of Portugal. Throughout the winter of 1810 the enemy had stayed in front of the Lines of Torres Vedras just a half-day's march from Lisbon, and there they had frozen and half starved to death rather than retreat to their supply depots in Spain. Marshal Massйna had known that retreat would yield all Portugal to the British while to attack the Lines of Torres Vedras would be pure suicide, and so he had just stayed, neither advancing nor retreating, just starving slowly through the winter and staring at the lines' enormous earthworks which had been hacked and scraped from a range of hills across the narrow peninsula just north of Lisbon. The valleys between the hills had been blocked by massive dams or with tangled barricades of thorn, while the hill tops and long slopes had been trenched, embrasured and armed with battery after battery of cannon. The lines, a winter's hunger and the relentless attacks of partisans had finally defeated the French attempt to capture Lisbon and in March they had begun to retreat. Now it was April and the retreat was slowing in the hills of the Spanish frontier, for it was here that Marshal Massйna had decided to make his stand. He would fight and defeat the British in the river-cut hills, and always, at Massйna's back, stood the twin fastnesses of Badajoz and Ciudad Rodrigo. Those two Spanish citadels made the frontier into a mighty barrier, though for now Sharpe's concern was not the grim border campaign that loomed ahead but rather the mysterious grey horseman.

Lieutenant Price had reached a patch of dead ground halfway up the hill where his redcoats concealed themselves as Sharpe waved his riflemen forward. The slope was steep, but the greenjackets climbed fast for, like all experienced infantrymen, they had a healthy fear of enemy cavalry and they knew that steep hillsides were an effective barrier to horsemen and thus the higher the riflemen climbed, the safer and happier they became.

Sharpe passed the resting redcoats and went on up towards the crest of a spur that divided the two valleys. When he was close to the ridge he waved his greenjackets down into the short grass, then crawled up to the skyline to peer down into the smaller valley where the grey horseman had disappeared.

And, two hundred feet beneath him, saw Frenchmen.

The men were all wearing the strange grey uniform, but Sharpe now knew they were French because one of the cavalrymen carried a guidon. This was a small, swallowtailed banner carried on a lance as a rally mark in the chaos of battle, and this particular shabby, frayed flag showed the red, white and blue of the enemy. The standard-bearer was sitting on his horse in the centre of a small abandoned settlement while his dismounted companions searched the half-dozen stone and thatch houses that looked as if they had been built to shelter families during the summer months when the lowland farmers would bring their flocks to graze the high pastures.

There were only a half-dozen horsemen in the settlement, but with them was a handful of French infantrymen, also wearing the drab and plain grey coats, rather than their usual blue. Sharpe counted eighteen infantrymen.

Harper wriggled uphill to join Sharpe. "Jesus, Mary and Joseph," he said when he saw the infantry. "Grey uniforms?"

"Maybe you're right," Sharpe said, "maybe the buggers have run out of dye."

"I wish they'd run out of musket balls," Harper said. "So what do we do?"

"Bugger off," Sharpe said. "No point in having a fight for the hell of it."

"Amen to that, sir." Harper began to slither down from the skyline. "Are we going now?"

"Give me a minute," Sharpe said and felt behind his back for his telescope which was stored in a pouch of his French oxhide pack. Then, with the telescope's hood extended to shade the outer lens and so stop even this day's damp light from being reflected downhill, he trained the glass on the tiny cottages. Sharpe was anything but a wealthy man, yet the telescope was a very fine and expensive glass made by Matthew Berge of London, with a brass eyepiece, shutters and a small engraved plate set into its walnut tube. "In Gratitude," the plate read, "AW. September 23rd, 1803." AW was Arthur Wellesley, now the Viscount Wellington, a lieutenant general and commander of the British and Portuguese armies which had pursued Marshal Massйna to Spain's frontier, but on September 23rd, 1803, Major General the Honourable Arthur Wellesley had been astride a horse that was piked in the chest and so pitched its rider down into the enemy's front rank. Sharpe could still remember the shrill Indian cries of triumph as the red-jacketed General had fallen among them, though he could remember precious little else about the seconds that followed. Yet it was those few seconds that had plucked him from the ranks and made him, a man born in the gutter, into an officer in Britain's army.

Now he focused Wellington's gift on the French beneath and watched as a dismounted cavalryman carried a canvas pail of water from the stream. For a second or two Sharpe thought that the man was carrying the water to his picketed horse, but instead the dragoon stopped between two of the houses and began to pour the water onto the ground. "They're foraging," Sharpe said, "using the water trick."

"Hungry bastards," Harper said.

The French had been driven from Portugal more by hunger than by force of arms. When Wellington had retreated to Torres Vedras he left behind him a devastated countryside with empty barns, poisoned wells and echoing granaries. The French had endured five months of famine partly by ransacking every deserted hamlet and abandoned village for hidden food, and one way to find buried jars of grain was to pour water on the ground, for where the soil had been dug and refilled the water would always drain away more quickly and so betray where the grain jars were hidden.