In the shadowy halls of Dublin Castle, 1907, a daring heist shook the British Empire. Four days before King Edward VII's royal visit, the priceless Irish Crown Jewels vanished without a trace. Sir Arthur Vicars, the somewhat incompetent Ulster King of Arms, found himself at the centre of the scandal that threatened to expose dark secrets lurking in Ireland's high society. As Scotland Yard tried to unravel the mystery, suspicion fell on the charismatic Francis Shackleton, brother of the famed explorer...

To this day the jewels have never been found. But now, Dan wants to try and find them, with your help. If you've ever come across any information relating to this story - an old newspaper article, a story from a relative or friend... we want to hear from you! Please write to us at ds.hh@historyhit.com.

Maybe Dan Snow's History Hit can solve the case once and for all.

Produced by Mariana Des Forges and edited by Dougal Patmore.

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