I think Bryan became a Born Again preacher, or a missionary or something, soon after 'Forever Changes' was released.
Yes, it was Arthur of course. Bryan's "conversion" explains the personnel change in the band after Forever Changes. The first two albums (with Bryan) were the best in my opinion, the earlier concerts were better as well if I remember correctly.
Greg Brown
For some reason Greg Brown always reminds me of City Folk, who are no longer together. Their "I am a patriot" is worth a listen just for the lyrics, even if one dosen't care for folk music.
www.keithgreeninger.com/clips/IAmAPatriot.mp3
Having mentioned folk music, I have to mention Kate Wolf. Another of those little known greats.