There's a chap who is quite knowledgeable about Liverpool Cowkeepers, Dave Joy.
He's written books about the subject, and done some talk-tours at least in the north of England. There was a thread on here about it not clever enough to provide a link, but if you put "Liverpool Cowkeepers" in as a search, it'll come up, and you'll be able to go to other sites from it.
The Dave joy chap may well be able to help you on that query.