[9] Dungarvan exchanged into the captaincy of a company in the Coldstream Guards on 21 May 1796,[10] and was appointed an aide-de-camp to George III on 9 January 1798.
[14] In January 1791, when styled Viscount Dungarvan, he hired a prostitute named Elizabeth Weldon from the Covent Garden Theatre and went to her home in Hackney, London.
The judge nonetheless admonished him, telling him from the bench, "My Lord Dungarvan, it is but justice to you to say, that it is impossible for you to go from this bar with the least imputation on your character.
[18] He had been shown by Bunn an image of the Roman Forum as 'a good design for a modern market-place'; he had demurred and 'thought of economy and said it would not pay'.
In November 1838 he recorded an incident in the Magistrate's Court when, finding the room very crowded, the Earl took up his own coat from the bench beside him and offered Bunn a seat: 'not as a mark of attention to me but of gentlemanly conduct'.
In 1857 his youngest son, Richard Boyle, vicar of Marston, had a school and schoolhouse built "For The Benefit of The Poor And in Memory of His father" on Tuckmarsh Lane along the southeast boundary of the family estate.