"Mrzzy: I thought Bruce Langhorne was (and still is?) a guitar player, not a bass player."

There are few known string instruments the Bruce Langehorne cannot play. Yes, he plays bass, but that does not mean he played with Pete Seeger or the Weavers.

Bill Lee, Russ Savakus, Felix Pappalardi and others were on a short list of bass players Vanguard producers would call when they needed one. Bill Lee was evidently reliable which is why he got the call so many times.