Detailed map of the French Coastline and mouth of the Seine River, from Cap de la Heve and Chef de Caux to Harflleur and Honfleur , from Heiden's Americanische urquelle derer innerlichen kriege des bedrängten Teutschlands. . .
This map focuses on the Raid of Le Havre, under the command of Admiral George Brydges Rodney in 1758. The British Admiralty had received intelligence that the French had gathered at Le Havre, at the mouth of the River Seine, a large number of flat-bottomed boats and stores which were being collected there for an invasion of the British Isles. After drawing up plans for an attack on Le Havre, Lord Anson briefed Rodney in person. The operation was intended to be a secret with it being implied that Rodney's actual destiniation was Gibraltar. This soon became impossible to maintain as Rodney tried to acquire pilots who knew the Normandy coast.
Rodney received his final orders at the end of June, 1758 and July 4, 1758 he was off Le Havre. His force includes six bomb-vessels which could fire at a very high trajectoy. I n what become known as the Raid on Le Havre, he bombarded the town for two days and nights, and inflicted great loss of war-material on the enemy. Rodney then withdrew to Spithead, leaving several ships to blockade the mouth of the Seine.
Although the attack hadn't significantly affected French plans, it proved a morale boost in Britain. In August Rodney was again sent to Le Havre with similar orders but through a combination of weather and improved French defenses he was unable to get his bomb-vessels into position, and the Admiralty accepted his judgement that a further attack was impossible. The invasion was ultimately cancelled because of French naval defeats at the Battle of Lagos and Battle of Quiberon Bay.