Yes, I have to agree, "Lord of the Reedy River with Mary Hopkin & Donovan singing together is "blissful."
I am also a big Mary Hopkin fan. There is so much more wonderful music of hers that I really love. You should have a listen to her singing a cover of the Billy Ed Wheeler song called, "The Coming of the Roads" You can listen to it on Youtube. It is sooo beautiful. Not singing that one with Donovan though.