Thanks, rr. Specifically, I was told that Ray was singing about heroin with this song, but when I saw he didn't write it I wondered if that was what the songwriters intended or what Ray read into it (or neither). And to clarify, I was only thinking of Ruby standing for H in this song, not in general usage.

I also optimistically thought it might not be too rough to work up some chords for this one, but it's not coming easily. Can anyone help on that?