Wilson Yung, nevw is correct. It is an historical grave site noted on several local tourist guides. I marked it when I found it.
"Paddy’s Flat Cemetery Paddy’s Flat, 4km along Paddy’s Flat Road travelling North. Graves date back to 1870. A bushranger is supposed to be buried here." see for example: http://www.tenterfield.nsw.gov.au/sites/tenterfield/files/public/images/documents/tenterfield/mig/1666-HeritageLocalRegister.pdf

I would have taken this from my Garmin GPS tracking. I have found the tracking can sometimes be out by 20m or so.