Shields, G.O. (1891). The American book of the dog. Chicago, Illinois: Rand, McNally & CompanyBulldog puppies featured in an ad for King Kennels of Providence, RI. Source: Huntington, H.W. (1901). The show dog. Providence, RI: Remington Printing CoLytton, J. (1911). Toy dogs and their ancestors. New York, New York: D. Appleton and CompanyLytton, J. (1911). Toy dogs and their ancestors. New York, New York: D. Appleton and CompanyDogdom, October 1911Dogdom, January 1912Dogdom, July 1913Dogdom, August 1913Dogdom, September 1913Dogdom, November 1913Boston terriers in Dogdom, December 1913Hunter–Trader–Trapper, March 1923An ad in the book: Sewell, A.J. (1907). The dog’s medical dictionary. London, England: George Routledge & Sons, LimitedDogdom, December 1911House and Garden, February 1919