Plate 9: A Donkey and a Mule by Joris Hoefnagel https://www.nga.gov/artworks/69752-plate-9-donkey-and-mule
(his sale, Sotheby’s‘ London, 15 July 1946, no. 2216); (The Rosenbach Company, Philadelphia
(his sale, Sotheby’s‘ London, 15 July 1946, no. 2216); (The Rosenbach Company, Philadelphia
(his sale, Sotheby’s‘ London, 15 July 1946, no. 2216); (The Rosenbach Company, Philadelphia
(his sale, Sotheby’s‘ London, 15 July 1946, no. 2216); (The Rosenbach Company, Philadelphia
(his sale, Sotheby’s‘ London, 15 July 1946, no. 2216); (The Rosenbach Company, Philadelphia
Philadelphia, 1935: 135-136. 1938 Pope 1938-1939, 3:2346; pl. 1197. 1945 Pope
(his sale, Sotheby’s‘ London, 15 July 1946, no. 2216); (The Rosenbach Company, Philadelphia
(his sale, Sotheby’s‘ London, 15 July 1946, no. 2216); (The Rosenbach Company, Philadelphia
(his sale, Sotheby’s‘ London, 15 July 1946, no. 2216); (The Rosenbach Company, Philadelphia
(his sale, Sotheby’s‘ London, 15 July 1946, no. 2216); (The Rosenbach Company, Philadelphia
(his sale, Sotheby’s‘ London, 15 July 1946, no. 2216); (The Rosenbach Company, Philadelphia