Mignon Harman (1911-1946) claimed, to Sir Kenneth Clark, to be the daughter of Sir Edward Elgar. The details of her birth have not been traced. There is no reason to doubt her claim, but whatever the truth of it, her story, and the story of her adoptive parents, Lilian and William O’Callaghan (sometimes Nelson) is fascinating, bizarre and tragic.
Mignon is certainly one of the dancers shown with Jack Buchanan. She is probably the dancer shown as a detail from a picture of the Plaza Tiller Girls, and the woman on the left of the photograph with members of the O’Callaghan family at North Sheen.