Elphinstone snorted derision, while Colonel Wigram, on Sharpe’s left, opened a leather-bound notebook. The middle-aged Wigram had the manner of a man whose life had been spent in an office; as though all his impetuosity and enjoyment had been drained by dusty, dry files. His voice was precise and fussy.

Yet even Wigram’s desiccated voice could not drain the excitement from the proposals he brought to this council of war. One hundred miles to the north, and far behind enemy lines, was a fortress called the Teste de Buch. The fortress guarded the entrance to a natural harbour, the Bassin d’Arcachon, which was just twenty-five miles from the city of Bordeaux.

Elphinstone, at the mention of Bordeaux, gave a scornful grunt that was ignored by the rest of the cabin.

The fortress of Teste de Buch, Wigram continued, was to be captured by a combined naval and Army force. The expedition’s naval commander would be Captain Bampfylde, while the senior Army officer would be Major Sharpe. Sharpe, understanding that the chill, pedantic Wigram would not be travelling north, felt a pang of relief.

Wigram gave Sharpe a cold, pale glance. “Once the fortress is secured, Major, you will march inland to ambush the high road of France. A successful ambush will alarm Marshal Soult, and might even detach French troops to guard against further such attacks.” Wigram paused. It seemed to Sharpe, listening to the slap of water at the Vengeance’s stern, that there was an unnatural strain in the cabin, as though Wigram approached a subject that had been discussed and argued before Sharpe arrived.

“It is to be hoped,” Wigram turned a page of his notebook, “that any prisoners you take in the ambush will provide confirmation of reports reaching us from the city of Bordeaux.”