Hi again Jim
Well the difficulty I'm finding is that, despite thinking there wouldn't be too many Margaret and Mary Alice Clarksons listed, there are actually quite a number and certainly in the Preston and surrounding areas. Of course it could be any one of these entries that are correct and therefore without going to the expense of purchasing relevant marriage certificates it's almost impossible to pinpoint which one may be correct. The only other thing I can suggest is if you can think of any names within your family working from the present day, backwards, it might be possible to trace back down the line to see if there's an obvious marriage between Clarkson and any surnames you may be aware of. That way we could find the births of children (perhaps cousins and so on you have) and this would give us the Clarkson maiden name alongside the child's surname, ie the father's surname which could tie in with a marriage.
As I say, I naively thought it would be easier than it has been to find Margaret and Mary Alice Clarkson.
Please do let me know if you can conjure any surnames that you can and I will look further, gladly.
Kay
Manager