Leonardo da Vinci (about 1499-1500) The Burlington House Cartoon.Charcoal (and wash?) heightened with white chalk on paper, mounted on canvas, 141.5 x 104.6 cm. Purchased with a special grant and contributions from the Art Fund, The Pilgrim Trust, and through a public appeal organised by the Art Fund, 1962. NG6337. Available at: https://www.nationalgallery.org.uk/paintings/NG6337 There were … More We called it the Leonardo cartoon. We visited it every week.