I have a 3-CD anthology, SANDY DENNY: WHO KNOWS WHERE THE TIME GOES. I find most anthologies are a mix of good and not so good but this one contains the really exquisite LISTEN,LISTEN, which also features Richard Thompson on mandolin. It was on her album SANDY and I bought that one after hearing it on John Peel's radio show in the early 70's. I think I remember Peel saying that LISTEN, LISTEN was worth the cost of shelling out for a stereo system!
It all seems such a long time, now - who knows where the time...oops.