Brains is correct :-
"Following the "clean elliptical crawl" for 8m the roof of the streamway is reached, with a convenient area to turn at the end to prevent a 'head first' down the 3m deep rift. Stay at this level and traverse downstream (right) for 6m to resin anchors in the left wall. From here follow the normally insitu traverse line for 8m via two rebelays along the Bad Step Traverse (the drop increases with progression). The traverse line ends at a resin anchor and a natural thread in a high level passage exiting on the left. This is easily followed for 26m to The Plug Hole, a 5m deep 2.5m diameter pot equipped with a resin anchor and usually a hand-line. Above is Corkscrew Aven. (The rope is of uncertain age and should not be trusted). Follow the stream from the bottom down a short climb for 23m to the top of Geology Pot "
Far Curtain is just before East Canal.