This photograph is available through CyberMuse - cybermuse.gallery.ca (Accessed: August 2010).
In the Photographic Collection of the Smithsonian Museum of American History (Catalog number: 481) this photograph is entitled "Saint John the Baptist" and the subject is noted to be Florence Fisher who was the grand-niece of the photographer Julia Margaret Cameron.
In the book Shannon Thomas Perich The Changing Face of Portrait Photography: From Daguerreotype to Digital (Washington, DC: National Museum of American History, 2010) p.24 it is stated that Cameron believed that females could stand in for male saints because the Christian message was more important than gender.