A diagram of Watt's 1776 steam engine ... An engraving showing child labour in a Welsh coal mine. The child on the left is a 'trapper' - they were responsible for opening and closing ventilation ...

The coal mines of the Tennessee Coal, Iron, and Railroad Company were some of the largest employers of convict laborers. Coal mines were dangerous for all workers. Collapsing mines, suffocation ...

Alongside his collection of artefacts gathered during a 40-year career, Mr Monks has created displays to tell the story of life in a coal mine and now wants others to enjoy it as much as he does.