|The Boston Bull Terrier, 1907, from Leighton's Book of the Dog|
America's sweetheart, the Boston Terrier, was the first fully recognized American bred non-sporting breed. Developed in Boston, Massachusetts, after the civil war and registered with the American Kennel Club in 1893, the breed was an admixture of two older more established dogs, the English Bulldog and the English White Terrier (now extinct). Additional crossings with the English Bull Terrier, Boxer and French Bulldog contributed to the development of the modern breed.
The original dogs weighed as much as 45 pounds.
In the 1890s, an assortment of "pocket" breeds were faddish. Although both genetic variants are now extinct, Beagles and Boston Terriers were bred so small "they could sit in a man's hand."
Hobby-kennels of wealthy aristocrats gave way to large numbers of small commercially operated kennels. Costs of purebred dogs dropped substantially making papered-pooches within reach of a large part of the American public.
To find out which breeds are genetically linked to Boston Terriers, check out this genetics website.
You might be surprised.