George Keppel, 3rd Earl of Albemarle, a noted military commander and another prominent member of the Rockingham Whigs was also a patron of Barret. Albemarle lived at Bagshot Park on the Crown Estate to the south of Windsor. Albermarle had Bagshot Park remodelled for him by James Paine between 1766 and 1772. One of the painting he commissioned was "The Long Walk, Windsor, with Brood Mares and Foals", which included the famous racehorse Eclipse. This painting became part of the John Julius Angerstein collection and was purchased at auction for Queen Victoria in 1883.