Napoleonic treaty
On 2 August 1806 the earl, fully fluent in French, departed for France, invested with full powers to conclude peace, the negotiations for which had been for several weeks carried on by the Earl of Yarmouth. Arriving on the 5th he and Yarmouth set about the arduous task of treating with Napoleon and Tallyrand. Yarmouth was recalled on the 14th and Lauderdale was left alone.
In his 'Memoirs ' Eugène François Vidocq wrote that circa Battle of Copenhagen (1807) Boulogne was also bombed. According to Vidocq at this moment Lauderdale was right in Boulogne, and was almost lynched by Frenchmen.
He was an Englishman, and the exasperated people were desirous of revenging themselves on him: they surrounded him, mobbed him, and pressed upon him; and in defiance of the protection of two officers who were attending him, they showered stones and mud upon him from all sides. Pale, trembling, and faltering, the peer thought he was about to fall a sacrifice, when sword in hand, I cleared my way through the rabble, crying 'Destruction to whoever strikes him!' I harangued the multitude, dispersed them, and led the way to the harbour, where, without being subjected to further insult, he embarked on board a flag of truce boat. He soon reached the English squadron, which the next evening renewed the bombardment.
Following the renewal of hostilities he left Paris for London on 9 October. A full account of the progress and termination of the negotiations appeared in the London Gazette of 21 October 1806.
Lord Lauderdale was made a Privy Counsellor in 1806 and a Knight of the Thistle in 1821.
After acting as the leader of the Whigs in Scotland, Lauderdale became a Tory in 1821 and voted against the Reform Bill of 1832.
