R.H Mathews, surveyor, locates a rock shelter on the left bank of the Hawkesbury River at the lower end of Sackville Reach. He writes that the roof is: “much blackened and begrimed with the soot of camp fires; and judging from this, and the accumulation of ashes on the floor, this shelter has probably been the haunt of Aborigines for several generations”. The paintings in the cave consist of 40 two-hand stencils and one boomerang. As many were faint, Mathews concludes they are of considerable age. (Brooks, 1st edit, 17-18).