Banduk Marika walks amongst the Sydney population.

These 19th century photographic glass slides purport to show images of both the living and the dead.

These 19th century photographic glass slides purport to show images of both the living and the dead.

In this glass slide, a man looks up to his right at an illuminated spirit.

A black-and-white glass slide showing a man sitting on a chair with arms folded over his knees. He is looking to his left at a spirit, partially superimposed over his left arm and chest.

A black-and-white glass slide showing a fashionably dressed man sitting sideways on a chair, elbow resting over the side, with a spirit hovering at his left.

A black-and-white glass slide showing two spirits - one behind and one to the left of a woman sitting on a chair.

A black-and-white glass slide showing two men sitting opposite each other, hands resting on a table, a spirit hovering behind them.

This black-and-white glass slide purports to show a man sitting on a chair with a spirit hovering at his left knee.

This glass slide shows a man sitting on a chair with his eyes closed and a spirit partly superimposed over his left arm and chest.