Cotman, John Sell (1782 – 1842) – Boats ashore. Cotman, John Sell (1782 - 1842) Boats ashore. Pencil. Exhibited: Walker's Galleries, 1935 as a leaf from one of the artist's sketchbooks. 5x7 inches. Framed: 11x13 inches. Sold Favourite See available works by this artist.