Sorcha and Catspaw,
Thanks for the effort -- it sounds like you found some of the same sites I did. I feel kinda guilty when it's a tough one like this.
Sorcha I think you are right -- it's going to take someone knowing it. It unfortunately is not on "Retrospective" but it is included in the new Buffalo Springfield boxed set -- a good excuse to go buy a CD that should already BE in my collection! Here are some lyrics as remembered. I tried using them all and the title in quotes -- man did I get some wierd results!

PRETTY GIRL WHY
Like a ghost of someone near she comes to haunt me in my dreams
Keeping such a hold upon my thoughts so near yet far away
Pretty girl why? Pretty girl why not love me?
Pretty girl why?

Still she doesn't see how she can make me be so miserable

The minstrel boy has gone to war now burdened with his father's soul