Secord, William: Dog painting, 1840-1940: a social history of the dog in art, including an important historical overview from earliest times to 1840 when pure-bred dogs became popular. Woodbridge, Eng 1992.
Secord, William: The Purebred Dog in Art: Eighteenth and Nineteenth Centuries. In: Best in show: the dog in art from the Renaissance to today. New Haven [Conn.] : Houston : Greenwich 2006. S. 101–131.