Ghost picture-Swirling forms in the graveyard

Swirling forms in the graveyard
An SX-70 picture taken by a Ms. Sahah of Chicago, Illinois in November of 1982 at the gravesite of her grandmother who died in April of 1934 at the age of 83. It appears to be a double- exposure but this is long before that was possible with an SX-70 camera. In this model, the film exits the camera and develops in your hand in sixty seconds. There are two distinct figures in the fog; one of a girl in long brown hair apparently holding a black animal in her lap and an older boy with his left arm around her waist. His right arm actually trails out of the photograph towards the bottom center. He is wearing a blue t-shirt with some sort of writing on it.