It was this very site, and Ironman’s post, that fired up my imagination to find these things! Last year I did!
Amazing place. Most walkers wander by oblivious ignoring the curious forms! Even when the moor is teeming with visitors, this backwater is usually empty of folk.
The name is said to be pronounced ‘doobler’ by the locals. Possibly deriving from an old regional word for a ‘large, shallow dish or plate’, according to Phillips in his book ‘Brigantia’.