According to Michael Kelly in his Reminiscences, the Duke of Aiguillon was, in 1796, in London with the revolutionaries Charles Lameth and the orator Dupont.

He states that the duke 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.

He was particularly fond of music, and had been a pupil of Viotti (then leader of the Opera House orchestra, at which Kelly was stage manager).'

On learning that the Duke of Aiguillon'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.

[2] 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.