Maria Island cemetery from a distance (the grey rectangle in the middle of the photo). For location context: Darlington is in the valley behind the barn on the left, the blue hills are the Tasmanian mainland. Google Maps
The cemetery was in use for all the settlement periods. During the convict eras, it was only used for free settlers, the prisoners being put in a mass grave. With one exeception. Most of the headstones have fallen down and broken so you don’t see them until you’re on top of them. That’s what the “rocks” in the photos are, remains of headstones.