Dan Q. Dao, THESE LIVESTOCK PORTRAITS WERE THE ULTIMATE DISPLAYS OF WEALTH IN 19TH-CENTURY BRITAIN, https://www.saveur.com/crazy-paintings-livestock-1800s-britain , Saveur, December 26, 2017, Available OnlineDudley Snelgrove, British Sporting and Animal Prints 1658-1874: A Catalogue, The Paul Mellon Collection , Yale Center for British Art, New Haven, CT, 1981, NE960.3 G7 B75 + Oversize (Mellon Shelf) (YCBA)