I am wondering whether sandyfeet is getting reply notifications.
The information from the certificates as requested by majm would be help if further assistance in this query is needed.
It is difficult to track anyone in a family history search when all information held by the Original Poster is not fully shared.
It would also be of benefit if previous links were listed including the ones on the UK board.
Here is one of them
http://www.rootschat.com/forum/index.php?topic=619381.0
Hello,
.......I believe she lived in a convent and was schooled by the nuns, she would have likely had a good education ....... Regards Sandy
Why do you think this, Sandy?
Worth noting for general interest that between 1899 and 1900 three women named Margaret McGrath married in NSW. One or none of them could have been a resigned teacher

Observation

It's a long way from Rhine Falls to Townsville
Sue