It has become apparent, James, that you do not wish to share information with those attempting to assist you. You have been asked several times to furnish details of your claim that the wife of Thomas YOUNG died in 1938 and still nothing is forthcoming and you offer no explanation for this.
Whatever your reasons, you have created an obstacle to forward progress.
I have previously looked at the likliehood of Sophia NEILSON being his wife and it remains a lead worth looking at, but there was a death in the name Sophia YOUNG in 1897.
EDIT A newspaper item places a woman in Lithgow named Mrs YOUNG in the right timeframe as a widow with young children. It may or may not be her EDITIf William YOUNG was a brother of Thomas, it is possible he was born in Wales as the headstone of William at Lithgow Cemetery gives his date of birth and place of birth as Wales.
http://austcemindex.com/cemetery.php?id=211Perhaps you had better order a transcription of the death of Thomas YOUNG to discover the answer to your questions.
Sue
Note. I have made an edit to this post. The information was inaccurate.