The White English Terrier -- in British Dogs, Dalziel 1881

p. 375

THE white English terrier, like many other breeds, has undergone considerable modification since public dog shows came into being. How the modern dog of that name was manufactured I do not pretend to say with certainty. Mr. James Eoocroft, Mr. Peter Swindells, and a few other Lancashire fanciers could throw light on the subject, but I shall not be very far out if I say a small dash of a light coloured and rather weedy fox terrier, a strong dash of bull terrier, and a double dash of whippet are about the proportions, and the correct ingredients used.