Re-discovering Folk Music

Last night I came across a historic video by the Chad Mitchell Trio done in the early 60's.  I used to listen to them when I was a kid on tv where they played on Hootenanny.  Their version of "You Can Tell the World" is powerful.  The song was performed by Simon and Garfunkel also, and written by Bob Gibson and Bob Camp.https://www.youtube.com/watch?v=-ofTZjx3ZCE