I have received an email about Hellifield Crag:
My friend Peter Gallagher who has lived for over 60 years in Embsay
says that on the crag at approx GR SD 9839 5655 there once stood Clifford
Tower, to keep an eye on the Nortons. No sign remains but it is on some
old ampes.
Tom Knapp
I replied to Mr Knapp:
It is certainly marked at http://www.old-maps.co.uk as "New Hall or Clifford Tower" on the 1853 map. Norton Tower is also marked on that map but just appears as "Norton Tower Hill" on the modern map.
I shall try to explore the site when I am next on Barden Moor.
Unfortunately the email address for a reply must have been mistyped since it bounced back.
Still, it was interesting info.