Mary, You are interested in "the centre of the Fishwick world."The surname originated twenty or so miles north of there in Preston, where there is still an area called Fishwick.Over the centuries groups have branched out in several directions, many into the traditional coal-mining areas as several of the more prolific 18th century Fishwick families were miners.The largest concentration of Fishwicks now is in what used to be called Central Lancashire (nowadays taken over by Greater Manchester) - i.e. the area around Wigan.Atherton is part of that. In other words, I suspect that you're looking at more than two branches being intertwined in the Atherton area. My own interest arises from the fact that my mother was born Alice Fishwick, in 1907, into one of the Westmorland branches.Since the early 70s I've been collecting Fishwick data from around Lancashire, Westmorland and Yorkshire (and more recently Durham)so may be able to give some pointers.Unfortunately, two notebooks which included several years of Central Lancashire note-taking from parish registers and old wills went missing along with some other papers during a business trip to Southern Afrca in November.I'm still hoping to get them back, but as time passes that is becoming less likely so I will have to rely on what I have already entered into the computer and may need to return to the original documents.
Let's keep in touch.We clearly have a common interest.