The breed is sufficiently modern to leave no doubt as to its derivation. In the first quarter of the nineteenth century attention was being directed to the improvement of terriers generally, and new types were sought for. They were alert, agile little dogs, excellent for work in the country; but the extravagant Corinthians of the time—the young gamesters who patronised the prize-ring and the cock-pit—desired to have a dog who should do something more than kill rats, or unearth the fox, or bolt the otter: which accomplishments afforded no amusement to the Town. They wanted a dog combining all the dash and gameness of the terrier with the heart and courage and fighting instinct of the Bulldog. Wherefore the terrier and the Bulldog were crossed. A large type of terrier was chosen, and this would be the smooth-coated Black and Tan, or the early English White Terrier; but probably both were used indifferently, and for a considerable period. The result gave the young bucks what they required: a dog that was at once a determined vermin killer and an intrepid fighter, upon whose skill in the pit wagers might with confidence be laid.
The animal, however, was neither a true terrier nor a true Bulldog, but an uncompromising mongrel; albeit he served his immediate purpose, and was highly valued for his pertinacity, if not for his appearance. In 1806 Lord Camelford possessed one for which he had paid the very high price of eighty-four guineas, and which he presented to Belcher, the pugilist. This dog was figured in The Sporting Magazine of the time. He was a short-legged, thick-set, fawn-coloured specimen, with closely amputated ears, a broad blunt muzzle, and a considerable lay-back; and this was the kind of dog which continued for many years to be known as the Bull-and-terrier. He was essentially a man’s dog, and was vastly in favour among the undergraduates of Oxford and Cambridge.
Gradually the Bulldog element, at first pronounced, was reduced to something like a fourth degree, and, with the terrier character predominating, the head was sharpened, the limbs were lengthened and straightened until little remained of the Bulldog strain but the dauntless heart and the fearless fighting spirit, together with the frequent reversion to brindle colouring, which was the last outward and visible characteristic to disappear.