You have my permission to load up your sleeping bag, pack an esky with lots of sandwiches, and take your thermos and Anzac Biscuits by the bucket load and move into the Kingswood Archives .... leave the food and goodies in their locker room, but .....
there's miles and miles and miles of shelves full of very important archive material held there. Only some of those archives are indexed and there's various volunteer projects indexing some of the rest ....
The staff are all very competent and if you are not yet familiar with the centre there, a big smile, loads of the two magic words we all know well, and a good listening ear, well ..... you may need to let your family know that you are changing your address ... this time to 143 O'Connell Street, Kingswood .... (I have a cousin who is a former archivist with NSW SRO, cousin is now retired)....
I must stress that I am only speculating from my armchair as to the Mary ROBERTS whose name is recorded on that Headstone at Wattle Flat. You will be Brilliant when you have researched through all the records I have suggested you seek out at NSW SRO .... It could be several days full on at the archives ....
And there's several RChatters who go there regularly, (not me anymore) who could be of help to you there....
I am over the moon re your family names.... My NSW families were in the Bathurst district very shortly after Mr Cox built the road across .... and they kept going west !
Cheers, JM