My family as well, Vic - every generation before me, that is.
I understand that the explanation I gave may have beeen a bit difficult to understand, but it's nothing to do with you being from Blyth. It's just that we have different areas of interest and expertise. If it's any comfort, I have the same problem with mining related explanations - but please keep them coming because even if I don't understand everything I'm always a bit wiser after reading them.
Knowledge shared is a wonderful thing and there's a wealth of knowledge, covering a diversity of subjects on this site: History, mining, computers, politics, Bedlington, and, dare I say it, language. Long may we keep sharing.