In 2004 Sam Cullen and his wife Janet bought a rare collection of photographs at a London auction.
They were captivated by the haunting faces in the photos.
The couple began piecing together a puzzle few thought could ever be solved.
Their quest took them to the beautiful Clarence River region of NSW and into some of the most troubling aspects of our history.
Now, eight years down the track, the Cullens' labour of love has turned up some astonishing and surprising results which are revealed for the first time on Monday night...
