‘More than likely,’ Napoleon conceded. ‘But if the Directory won’t provide us with siege guns we’ll have to find some from another source. I gather that the armies of the papal states have a more than adequate supply of heavy guns. I am certain that His Holiness will be happy to part with them, and provide us with a decent settlement, in exchange for peace with France.’

‘Blackmail,’ Berthier muttered. ‘How can we be sure it will work? What if the Pope decides to go to war? And if the King of Naples sides with him then we’ll be caught between them and the Austrians. Not a good position to be in, sir.’

‘No more dangerous than being caught between an old man and a weakling,’ Napoleon replied. ‘Trust me. The Pope is a realist. Even with God at his side he knows that victory generally goes to the bigger battalions. He will give us what we want.’

‘And if he doesn’t?’

‘Then God have mercy on him, because I won’t.’

Once the Army of Italy was in position between the Austrian army and the fortress at Mantua Napoleon turned his attention to the latter as Italy basked in the hot summer sunshine. As the French troops laid siege to the fortress Napoleon and his staff observed the proceedings from the top of a watchtower on a Venetian banker’s mansion. It was a sultry day and the climb up the narrow flight of steps had left them hot and sweating under their uniforms. From the decorative battlements of the tower the officers could see the outer works of Mantua and examine the defences through their telescopes. Napoleon watched the French advance guard marching along one of the dykes that radiated from the fortress town. Mantua had been constructed in the middle of three lakes on its northern side.To the south it was protected by a great sprawl of marshes. The five dykes were the only means of approach and these were protected by great bastions. Behind their ditches and ramparts hundreds of cannon commanded the roads that ran along the dykes.

Napoleon lowered his telescope and snapped it shut.

‘Not an easy task, I think.’ He turned round, eyes searching out General Serurier. ‘This job is for you, Serurier. There’s no chance of taking the place by a direct assault. Not until the defences are battered down. And that can’t happen until we secure the siege artillery.Your orders are to contain the Austrians. Nothing more. At least not until I can reinforce you. Are you clear on that?’

Serurier nodded. ‘Yes, General. When might I expect to have the guns and the men?’

‘Now that we have come to terms with the Pope, they will be on their way to us any day.’