Surely the Patterdales we know of today were developed and created by Breay and Buck and then the likes of Brightmore, Nuttall, Gould, Stacey, Roberts etc took them to the next level and so on and so on.
I'm an obsessive reader in anything to do with terriers and the first blacks that appear consistently are with the men mentioned.
In the good terriers I've seen if you trace the pedigrees back far enough it's all black/choc Patterdales til the early 70's and then its goes back to Lakelands owned by a few men that are in Plummers Fell Terrier book.
Neil I think Buck died 1996 not 80's.