Note: Diana L. Paxson is an uncredited co-author of this story. Source: Marion Zimmer Bradley's introduction to Paxson's Spirit Singer on page 32 of Sword And Sorceress XI edited by Marion Zimmer Bradley. The introduction includes the following:

... If you haven't read Diana's other books, look them up in Books in Print: They're good. So good in fact, that when I decided to write the story mentioned at the end of Mists of Avalon—about Roman Britain and the Druid priestess Eilan—it was Diana I chose to collaborate with me on it. Because of marketing decisions, Viking decided my name alone would sell better—I'm not sure why—but here among friends, so to speak, I'm happy to acknowledge Diana's help and input. It should be out in April 1994; look for The Forest House.