I have the information about Elizabeth being married to William Brown and I have a lot of their desendents, but I have not been able to connect her to Allen Farquhar. There is a gap in the children of Allen Farquhar and Sarah Jane Moore between 1755 and 1764 with their children, but I just don't know where Elizabeth fits in. I will send you what I have on her and Williams family if you would like that. I have a tree with over 280,000 names so far, related and distant. If there is anyway I can help let me know.