Strictly speaking it wasnt bull terrier blood that was in the Nuttall line ( even though he kept one in his house)..it was northumberland pit terrier or pit dog that was brought down from the newcastle area by his grandfather. Granted that line may well have had a splash of bull blood put into the breeding to ' up' the bone mass but it was only a very bit part of the story...he used a line of very hot wired border terriers whenever he considered his line was deficient in pepper and i recall him saying that that line of border would gti a faltering stafford line, so potent was it. Useing the border he'd have got no litter wastage with the fell & border being almost cousins...the apple head of the border is likely what confuses folk to the use of bull blood...though herberts poncing off nuttalls work did use bull blood ( only cause they couldnt access the pinpoint border blood)
The border line was out in winsford.