"We Are Dancing Sarah's Circle" is also hymn no. 212 in the current Unitarian Universalist Hymnal, "Singing the Living Tradition" - Unitarian Universalist Assn. (UUA), 1993. It's directly across the page from a version of "We Are Climbing Jacob's Ladder", which is printed in the key of D flat.
No. 212 is the same tune but in the key of C with words credited to Carole A. Etzler, (c) 1975. She apparently had it on one of her albums at that time and has since changed her name to Carole A. Eagleheart.
There are a couple of supplements to this hymnal, one of which is: "Between the Lines, Sources for Singing the Living Tradition" (Skinner House Books, 1995). Under hymn 212, this shows: "Carole A. Eagleheart (1944- ) writer, composer, and performing artist attends the Champlain Valley Unitarian Universalist Society in Middlebury, Vermont. This text was inspired by feminist theologian Nelle Morton."