The surviving members of Peter, Paul and Mary knew that they could never replace the voice of their longtime partner in folk singing after Mary Travers died in 2009.
Instead, Peter Yarrow and Noel Paul Stookey are keeping Travers’ spirit alive in part by continuing to sing the protest anthems Where Have All the Flowers Gone? and If I Had A Hammer, and the trio’s wistful hits Puff the Magic Dragon and Leavin’ on a Jet Plane, at concerts benefiting each other’s favorite social-justice causes.
https://www.vnews.com/Peter-Paul-keep-hammering-for-justice-29856625