Career
He became a general in the Republican Army, but had to flee during the Reign of Terror of 1793–1794. According to Michael Kelly in his Reminiscences, the Duc d'Aiguillon was, in 1796, in London with the revolutionaries Charles Lameth and the orator Dupont. He states that the Duc had been 'one of the twelve peers of France, who, in former days, had an immense fortune, was a great patron of the arts, and so theatrical that he had a box in every theatre in Paris.
On learning that the Duc's fortune was entirely lost or sequestered, Kelly arranged for him to make a little money by copying sheet-music, which he did secretly during the day, continuing to attend the theatre in the evening. Eventually an order came from the Alien Office of the British Government that he and his friends must leave England in two days. The Duke went to Hamburg, and was condemned to be shot.
'They told me that he died like a hero,' wrote Kelly. The Duke left his favourite Danish dog in Kelly's care, shedding many tears on parting from it: the animal outlived its master, but pined and died soon afterwards.