[10] At the height of the Gordon Riots, on 7 June 1780, Gibbes was quoted in the London Courant as favouring the formation in Marylebone of a volunteer militia unit.
[16] His works included: The anonymous Reflections on the proclamation of the second of July 1783, relative to the trade between the United States of America and the West India islands: addressed to the Right Honourable William Pitt, first lord of the Treasury, and chancellor of the Exchequer has been attributed to him.
[20] At St James Church, Barbados, in 1753, Gibbes married Agnes Osborne—the only child and sole heiress of another Barbadian planter of English origin, Samuel Osborne.
They were raised largely in England by Lady Gibbes, while Sir Philip concentrated on his business and political affairs in Barbados, London and Bristol.
During the 1780s, she and the children stayed near Wolverhampton—at Hilton Park (the ancestral seat of the Vernon family) in rural Staffordshire, where she and her daughters had a visit in 1783 from John Wesley.
He served as Chief Justice of Barbados, but was removed from the position by Governor George Poyntz Ricketts in 1797, in controversy over the murder trial of Joseph Denny, a man of mixed race.
Maria then in 1818 married Sir John Palmer-Acland, 1st Baronet as his second wife;[1][26][27] The other children were: During the early 19th century, Gibbes became estranged from his two sons.