Unearthed in 1912, squirreled away for a lifetime and then handed in to a museum — the story behind the discovery of an ancient Egyptian coin in far north Queensland is almost as mysterious as how it came to be there.The bronze coin — about the same size as a 50 cent piece — was minted during the reign of Ptolemy IV, between 221 and 204BC.More than two millennia later it was found about seven centimetres underground in the depths of the far north Queensland rainforest.The man who found it, Andrew Henderson, had abandoned the gold mining fields of...