Was the farthest point reached by Surveyor Robert Hoddle, in October 1823. He recorded,"reached a Hill, distant 25 miles from Encampment. The summit was a sandstone rock, in the form of a Pyramid, whose base was 70 feet wide and 50 feet high, which I named Pyramid Hill". Andy Macqueen suggests the hill Hoddle climbed was Birds Rock , via Sunnyside Ridge Road, certainly the highest point in this locality at 1181m. Ref: Macqueen, Andy. Assistant Surveyor Robert Hoddle's 1823 Excursion in the Gardens of Stone - and a Dark Secret? Blue Mountains History Journal, Issue No. 6; December 2015.