The artist; (his estate sale, Christie, Manson & Woods, London, 8-15 May 1874, no. 329, as _The Duke of Devonshire and a Lady at the Door of a Mansion_). (Henry Graves & Co., London).[1] Edward C. [d. 1915] and Mary Griffin [1855-1937] Walker, Willistead Manor, Walkerville, Ontario, and Washington; bequest 4 May 1937 to the Corcoran Gallery of Art, Washington; acquired 2014 by the National Gallery of Art. [1] See "Studies and Sketches by Sir Edwin Landseer, R. A.," _Appelton's Art Journal_, 1875: 66. The painting is referred to as _The Duke of Devonshire and Lord and Lady Cavendish_.