I saw him at the Main Point in Philadelphia in December 1969, and I still have his first two solo albums from 1969, Rhymes and Reasons and Take me to Tomorrow. He wasn't a folksinger then, but the songs he sang certainly reached me, as an angst-ridden and impressionable teenager. He wrote some good songs, and had good taste in the other songs he chose to sing, for the most part.

Aloha,
Mark