So are you, initially, looking for children of the Beals/Cowdray marriage?
If so, have you looked through the full birth indexes? Free to search on ancestry, and for the years you will be searching through they will give the mum's maiden name, so will be easy to spot possible children of this marriage
Also, have you got the marriage cert, to try and confirm it is the right person, as your first post seems to have an element of doubt.