This Wonder Woman themed birthday cake has "Happy Birthday Dr. B" written on it. The cake was for Dr. Rupert E. Billingham's birthday. Dr. Billingham was Chair of the Southwestern Medical School Department of Cell Biology from its inception in 1971 until his retirement in 1986. He was a pioneer in the fields of reproductive immunology and organ transplantation immunology. Note: This image was digitized from a contact sheet; it is likely that the black "X" on the image was a mark to indicate that the photo was to be reproduced from the photographic negative.