Portrait of harriet arbuthnot (1793-1834) was an early 19th century english diarist, political hostess and close friend of the duke of wellington. Object Type: painting. Date: circa 1805. Dimensions: height: 72 cm (28.3 in); width: 60 cm (23.6 in). Medium: oil on canvas. Collection: Lázaro Galdiano Museum. Harriet Arbuthnot