The only probable picture of Kate Warne, the first female detective. Not only was she the first detective, but she even went on to save the life of president elect Abraham Lincoln after uncovering a plot to assassinate him on the way to Washington D.C. to take office. She was best known for being a master of disguise, able to switch from Union soldier, to Southern debutante, to a harmless grandmother.
Kate Warne is one of my heroines. She walked into the Pinkerton Agency and demanded a job as a detective. To their credit they hired her.