Here you go, Susan, but I had trouble understanding some of the words, so you've got my best guess. The first word of the song has an 'oo' sound to it, rather than 'Oh', but I can't hear any consonants, so -- guess.
Dunno about the swan, what it's doing in the second line, but I can't think of anything else that sounds like that. Robin sings half the verse each time, and they sing harmony on the chorus. A beautiful song, but hard to understand their words. Robin may have said 'I'd' in the last verse, but maybe not.
Took me several tries to even get the chorus; I'd thought originally the third line was "For seasons are lonely; a person is all/That you hope..."
Enjoy! And if you want to guess for yourself, I recommend the CD, it's a good 'un.
Blessings,
Barbara

THE BLACK DODDER
(by Mick Fitzgerald)

Oh,(New? Cruel?) springtime comes; the rain in the morning
And the swan's (?) changing view -- scattered weeds blowing;
And I am your stranger, to chance without warning
On the song of the black Dodder flowing;

CHORUS:
Oh, spring rushes on and leaves you;
And trees will be green while they stand
For seasons are only a verse in your song
That you hold for a while in your hand.

She flows like a water both easy and free
Over the secrets well hidden from me;
And riches and houses keep growing; keep growing;
Soon they'll bow to the black Dodder flowing;

I stood for a while but she turned for the sea,
Saw the wind reach and touch her, before turning to me;
And I('d) walked along with her without ever knowing
The song of the black Dodder's flowing;