I learned this song from the singing of a priest who is no longer with us but probably did more for folk singing in my part of North Wales than anybody else that I have ever known. From my memory, his version was very similar to the version that radriano has given but it had an etra verse (the second verse):

I sat down beside them with the flowers all around

We ate from a mantle? spread out on the ground.

They told me of people, of prophets and kings

They told me of one God that knew everything.

Jon