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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...