What a loss. I first met Jack in 1974 when he joined other teachers/musicians in teaching a week-long workshop in the Boston area on how to use folk music to teach American history. He had us all on fire to (as Animaterra said), go out and teach like that--to "make people feel about music and singing the way he makes me feel!". Years later, I sang in the chorus, directed by Jack, of the very first Christmas Revels in Washington DC. His joy was so infectious, and his love of the music so profound, that he had us all believing we could, as a musical community, really sing back the sun on the shortest day. He will be deeply missed by so many whose lives he touched, but the joy he shared will live on through Revels performances and recordings and so many people's memories of his joyous influence.