A variant study of the face of May Morris as an angel in the Sixth day in The Days of Creation. She is the Angel holding the globe containing Adam and Eve. Georgiana Burne-Jones diary July 1873 "Jennie came and sat for and angel in the Creation". From the likenesses this would suggest that both sisters sat for the angels in the paintings.
The model used for the angels faces was May Morris, a series of photograph portraits were taken of her in the early 1870s by Robert Faulkner & Co. aged about twelve (acc. nos NPG x129530 and NPG x29071 illustrated here), these were possibly posed by Burne-Jones himself.