According to another theory, maybe Jack wasn’t “Jack” after all, but a woman, which was a theory posed by famed Inspector Frederick Abberline at the time of the killings. According to Donald McCormick, author of The Identity of Jack the Ripper published in 1959, Abberline raised the theory in a conversation with his mentor, Dr. Thomas Dutton after the murder of Mary Kelly. Testimony given by Caroline Maxwell, who lived in the area, was central to the argument.