I don't think I call the tune a variant of "Simple Gifts", MGoH. "Lord of the Dance" gets pretty close, as does "George Fox" but I think Sydney went a little further afield on this one. The tune is more stirring, martial even, and the chorus starts on the second note of the scale for the first three notes, which is not the structure of the B part of Simple Gifts. The verse could be a variant, I guess.
Can I post the tune on Alan's page without POing the publisher?
Blessings,
barbara