Mabel Chinnery's Mother (The Back Seat Ghost)

Mrs. Mabel Chinnery was visiting the grave of her mother in 1959 along with her husband. Mabel took a camera with her to photograph the gravesite. When she was finishing up she took an impromtu picture of her husband who was waiting alone in the car.

Mr. Chinnery with a passenger?

When she had the photographs developed she noticed that maybe her husband was not on his own. Sitting in the back-seat was someone who resembled Mrs. Chinnery's mother. 

Back Seat Ghost

Experts agree that the photograph is genuine and not a reflection or double exposure. Could this be her mother sitting in the back seat?