William Henry Cavendish Bentinck, 3rd Duke of Portland, Matthew Pratt, circa 1774

Portrait of william henry cavendish bentinck, 3rd duke of portland (1738–1809). Object Type: painting. Genre: portrait. Date: circa 1774. Dimensions: height: 76.3 cm (30 in) ; width: 63.2 cm (24.8 in). Medium: oil on canvas. Depicted People: William Cavendish-Bentinck, 3rd Duke of Portland. Collection: National Gallery of Art. Duke of Portland by Pratt