I have a Martha/ Margery Quilliam 1791 - 1845 md to John Corris Parick Nov 1814. Those facts are Ok. Then I have found parents to Martha as William 1744 - 1792 & Isabel Kelly 1748 - ? Md 1773. Martha/ Margery is the last child but Isabel would be 50 when she had her & William would have died a year after she was born. This can't be right, 50 is just possible I expect but unlikely. Need a bit of help please.