I have a small beagle
I understand that beagles are intelligent but very single-minded. 
Yeah thats very true they are very single- minded animals
was developed in Great Britain around the 1830s from several breeds, including the Talbot Hound, the North Country Beagle, the Southern Hound, and possibly the Harrier.
Beagles have been depicted in popular culture since Elizabethan times in literature and paintings, and more recently in film, television, and comic books. Snoopy of the comic strip "Peanuts" has been called "the world's most famous beagle".
History.
Small hounds are mentioned in the Forest Laws of Canute which exempted them from the ordinance which
youth. 
The Airedale Terrier, like most terriers, has been bred to hunt independently. As a result, the dog is very intelligent, independent, strong-minded, stoic, and can sometimes be stubborn. If children and Airedales are both trained correctly, Airedales can be an excellent choice for a family dog. Airedales can do well with cats and other small animals, especially when they are raised with them. They are also very loyal to their owners. 
Albert Payson Terhune wrote of the Airedale: