The Patterdale Terrier originated in the Lake District, U.K. Local terrier types were bred for the purposes of hunting red fox in the rocky fells where digging was difficult at best, and more often impossible. Much has already been written in regard to the history of the Patterdale Terrier. As a novice Terrier Man, I have nothing to add. The Wikipedia page for the Patterdale Terrier is a good brief synopsis, and a jumping off point for further research if your interest stirs. There are also many books written on the type/breed. (See link below).
Rocky outcrops of the Fells in the Lake District, U.K.