Seemingly it was quoted from Cecil J. Sharp's English Folk Songs from the Southern Appalachians (1932, vol. 2, No. 94-D, pp. 54-55), where the same verse appears.

          THE FALSE YOUNG MAN
                      Sung by Mrs. Sophia A. Hensley
                      at Clay Co., Ky., 1908

1. I walked out one bright May morning
    To hear the birds sing sweet,
    I seated myself in a green shady grove
    To see two lovers meet.

2. To see two lovers meet, my dear,
    And to hear what they might say,
    For I wanted to know a piece of their mind
    Before I went away.

3. Come sit you down, my own true love,
    Come sit you down by me,
    For it has been three-fourths of a long, long year
    Since together we have been.

4. I can't sit down and I won't sit down,
    For I have not a moment of time,
    And perhaps you have another true love
    And your heart's no longer mine.

5. You know what you told me, love,
    You know what you said,
    You know what you promised me
    When another true love was dead.

6. You made me believe by the faults you swore
    With your arms all around my waist,
    You made me belive by the faults you swore,
    That the sun did rise in the west.

7. That the sun did arise in the west, my dear,
    And turns square back to the east;
    But once again I've come to myself
    And I find you are a thief.

8. I never will believe what another boy says,
    Let his eyes be dark or brown,
    Unless he's upon a high gallows top,
    Saying: Love, I'd rather come down.

9. I'd rather not be hung;
    For the words of a young boy
    Are too hard to believe,
    For they li-ee to every one.

~Masato