Strange you should say that about Campbells Daughter.
I only started listening to his stuff quite recently but have some friends who are big fans, met him a few times, go to all his concerts when in the UK etc.
When I heard this song it struck me hard & I asked around for words, chords etc.
None of these 'fans' had heard it or remembered it!
Yet when I play it they say its great(an I'm not very good).
As Eric said, VERY under-rated.