British Army Captain Fred Holroyd was met at the border near Dundalk by a joint Garda and military convoy and then escorted to Dublin. It was May 1975, and Holroyd - stationed in the six counties and intimately involved in counter-insurgency operations there – was on his way to a top-secret meeting. He was travelling to Garda Headquarters in the Phoenix park to meet Assistant Garda Commissioner Edmund Garvey.