Thanks keberoxu & leeneia. Great help!

But sadly I am still no further forward! As the poem by Lydia Huntley Sigourney is not the correct words, & 'The Church In The Wildwood' is the wrong melody (& its words aren't a correct match).

Although I can now see where Tom Paxton got his inspiration for 'Forest Lawn'! I must admit when I heard the T.P. song that it sounded - from the way it was put together incl. when it changed pace part-way through - that it might well be a pastiche. So I was delighted to be told of the song 'The Church In The Wildwood'! So, thanks leeneia.

Any further thoughts by anyone?

Maybe I remember it from my childhood, & that it therefore IS the Tom Paxton song BUT! cleaned up - i.e. made less negative & more upbeat, to suit children. Perhaps, perhaps . . . ?!