Source: Shaw, V. K. (1879). The illustrated book of the dog. London, England: Cassell, Petter, Galpin & Co.Source: Shaw, V. K. (1879). The illustrated book of the dog. London, England: Cassell, Petter, Galpin & Co.Sketch from the book: Shields, G.O. (1891). The American book of the dog. Chicago, Illinois: Rand, McNally & CompanySource: Bolton, S. K. (1902). Our devoted friend: the dog. Boston, Massachusetts: L. C. Page & Company.Great Dane and Scottie as pictured in the book: Baynes, E. H. (1922). Polaris, the story of an Eskimo dog. New York, NY: The MacMillan Co.