Found it - but not the way I had planned. I walked in along Cowan Perimeter Trail Mallawa Rd in Terrey Hills. Theres a sign saying the public can not go down Bulara St so I parked on the corner. When you come to the cross roads in Perimeter and Cowan turn right along Perimeter which isn't shown on the graphic map - but you can see it on a satellite image of the area.
My plan was to get half way along Perimeter then turn down the short track to the left but when I got to the end there was a big gully thick with bush and I didn't have enough light. On the way out in between the cross road and the left turn down to the dead end I noticed a pile of rocks and what looked like an animal path. I decided to go back and see this this path led to Arthur. Yes it does and further. Arthur is only just there and in fact I walked right past it the first time. Hes by a big gum tree. I'm planning on see where the path ends up hopefully this week. Poor Arthur is now a small flat pile of rocks. It wood be good to rebuild!

Rated: for Overall Experience.