The chain mail, which is known as a hauberk, was stored in a garden shed in County Longford until the person who discovered it attended a Norman People event at a local tourist attraction.
A group of four men doused petrol over the main rooms of Killeen Castle in County Meath in the early hours of the morning on May 16, 1981, to highlight the cause of Bobby Sands and other republican prisoners at Long Kesh Prison.