Hi M J E. Thank you for the private message. Sorry but I'd rather communicate on G2G: you can reply to me with a comment in the web page.
Probably the best thing you can do at the moment is to continue building up your family tree by adding any grandparents you know of (with appropriate privacy settings if still alive) and then further ancestors, watching out that you are not creating duplicate profiles. You can also upgrade from family membership to full genealogist membership (for free), which will enable you to edit many already existing profiles.
Did any of the possible children Murray, Myrtle or Herbert I found in my answer sound relevant?