It's on 'Carry It On' (Seeger, Sapp and Kahn) Flying Fish CD You can hear an audio clip here:
http://www.amazon.com/Carry-Songs-Americas-Working-People/dp/B000000MF2

I found it in the book of the sme title(ISBN01371848X) book, where it had these additional words after V2
@who are these children dressed in red? Must br thr ones that Moses led.(Harriet was called 'The Moses of her people')