"I once sent Peter Yarrow the lyrics to this poem I found, called "The Lover's Task"," ..........
You probably meant well but you may have all-be-it, unwittingly assaulted Peter Yarrow by sending them your lyrics, uninvited.
(if that's the way it happened)
By even acknowledging that he has received them, Peter opens himself up to all sorts of criticisms and law suits, down the road.
I would strongly advise any songwriter to exercise extreme caution in the way that they choose to pass their work around, no matter how well intentioned.
Not saying that's how it happened, Sharmagne. Just taking this opportunity to make an important point.