The words are different the original (Child) version but this is a very close approximation of the song as performed by Sandy Denny.
"I forbid you all that wear gold in your hair To travel to Carterhaugh, for Tam Lin is there
None go by Carterhaugh but they leave him a pledge Either their mantles of green or else maidenhead"
Janet tied her kirtle green a bit above her And she's gone to Carterhaugh as as go can she
She'd not pulled a rose, a rose but only two When up then came young Tam Lin, says, "Lady, no more"
"And why come you to Carterhaugh without command me? " "I'll come and go", Janet said, "and ask no leave of thee"
Janet tied her kirtle green a bit her knee And she's gone to her as fast as go can she
Well, up then spoke her father and he spoke meek and mild "Oh, and alas, Janet," he said, "I you go with child"
"Well, if that be so," Janet said, "myself shall the blame There's not a in all your hall shall get the baby's name
For if my love were an knight, as he is an elfin grey I'd not change my own true for any knight you have"
So Janet tied her kirtle green a bit above her And she's gone to as fast as go can she
"h, tell to me, Tam Lin," he said, "hy came you to dwell? " "The queen of fairies caught me when from my horse I
And at the end of seven years she pays a tithe to I so fair and full of flesh and feared it be
But is Halloween and the fairy folk ride Those that would let true love win at Mile's they must bide
So first let pass the horses black and then let the brown Quickly run to the white steed and the rider down
For I'll on the white steed, the nearest to the town For I was an earthly knight, they give me that
Oh, they will turn me in arms to a newt or a snake But hold me tight and not, I am your baby's father
And they will turn me in your arms a lion bold But hold me tight and not and you will love your child
And they will turn me in your arms into a naked But me in your mantle and keep me out of sight"
In the middle of the she heard the bridle ring She heeded he did say and young Tam Lin did win
Then up spoke the queen, an angry queen was she, "Woe betide her ill-far'd face, an ill may she die"
"Oh, had I known, Tam Lin,'' she said, "what night I did see I'd have him in the eyes and turned him to a tree"