Sir Harry shrugged. ‘I think you put too much faith in our Portuguese allies’ assessment of the enemy’s strength.’

‘I have learned to be circumspect in considering the information offered to me by the local people, sir. Even allowing for that, I believe my judgement of the strategic situation is sound.We have a good chance of defeating Junot and taking Lisbon in a matter of days, if we act quickly.’

‘Perhaps. But even if you are right, what harm is there in delaying any advance until Sir John Moore arrives with his men? Then we shall outnumber the French beyond any question and should be able to guarantee a crushing victory.’

‘Sir John may not arrive for some days, possibly weeks.That is more than enough time for Junot to receive overwhelming reinforcements from the French army in Spain. It would be far better to defeat the enemy now than to wait and risk a battle against far greater odds.’

Sir Harry clasped his hands together and leaned back in his chair with a weary sigh. ‘I will not make any decisions before I have a full grasp of the facts. I will read your report in the morning and we will discuss the matter further when I take command of the army tomorrow evening. I thank you for taking the trouble to come to see me, and I suggest that you return to shore while there is still light. I bid you a good night,Wellesley.’

Arthur stared at the older man for a moment. Inside he was seething at the waste of the opportunity that Sir Harry was squandering through his caution. But there was no point in trying to persuade him to take action tonight. Best to let him read the report and then make another attempt to cajole him into action when he assumed command tomorrow. Besides,Arthur realised as he stared at the failing light outside the stern windows, Sir Harry had a point - it was getting dark and he did not wish to risk being rowed through the surf in pitch darkness. He stood carefully and bowed his head. ‘Until tomorrow then, sir.’

For the second night running Arthur was roused from his sleep in the early hours by his aide-de-camp. He had established his headquarters in an inn on the edge of Vimeiro and had been looking forward to sleeping in a proper bed. However, the unsatisfactory interview he had endured with Sir Harry preyed on his mind and he had not fallen asleep until close to midnight. Now he glanced at his watch and saw that it was barely an hour into the new day.

‘What now, Somerset?’

‘Sir, I’ve had reports from our scouts in the direction of Torres Vedras. They say that Junot’s army broke camp just after nightfall and started marching on Vimeiro.’