Grace Boyle, was the wife of Charles Sackville, Earl of Middlesex and later 2nd Duke of Dorset.
[3] She married the Earl of Middlesex in 1744, but he did not inherit his father's title of Duke of Dorset until after her death.
From 1747 to 1763, the countess held the position of Mistress of the Robes to Augusta of Saxe-Gotha, the Princess of Wales.
[2] When her mother died in 1755, the countess arranged a memorial, designed by Louis François Roubiliac, to her parents, which was erected at St Mary's parish church in Walton-on-Thames.
[2] On her death, the countess left Ashley Park not to her husband but to a cousin, Colonel John Stephenson.