Files contain documents regarding Raids on Hook Tower in 1920-21 during the Irish War of Independence and again in 1923 during the Civil War. The Raids were carried out by the Irish Republican Army and the Irish Republican Army (Anti-Treaty) forces. The purpose of the Raids were to seize explosives used for firing explosive Fog Signal. Included below are extracts from reports by Thomas Faulkner, Principal Keeper on the Raids: 31 May 1920: 'Station raided 11.30 last night by armed men in motor cars. Compelled Keeper on Watch to accompany them to doors of Magazine and Detonator Store. Carried away 4620 Detonators, 4200 Charges...Telephone wire cut. Am informing Constabulary immediately. Lightkeeper, Hook' ; 24 September 1920: 'Station raided 1.15 A.M. this morning by armed raiders in motor cars. Compelled Keeper on Watch to deliver up all explosives...taking with them 82 Charges, 2177 Detonators, also telescope. Telephone wire cut. Informing Constabulary Duncannon. Lightkeeper Hook' ; 11 January 1921: 'Station raided last night. Electric Battery, Galvanometer and Cable of both firing Jibs taken. Informing Constabulary. Lightkeeper' ; 3 April 1923: 'Five armed men visited Station and demanded to be shown over premises...taking with them 14 Detonators and the 2 C. P, Charges that were ate the Station...T. Faulkner P. K.'.

Files contain documents regarding Raids on Fastnet Lighthouse during and after the Irish War of Independence. The Raids were carried out by the Irish Republican Army. Included below are extracts from reports by J. J. Treeby, Principal Keeper and J. Crowley, Assistant Keeper: 20 June 1921: 'Fastnet was raided this morning at 1 am by armed men. Took telescope and binoculars, left 400 C. P. Charges and 1000 Detonators ; 21 March 1922: piece of pine for flooring was removed from Crookhaven Stores along with other articles.

Files contain documents regarding storage of explosives at Explosive Fog Signal Stations. Included are details of: quantities of explosives each stations, storage and security conditions (September 1917) ; police escort when transporting explosives (February 1919) ; stocks of explosives to be reduced to a minimum (May 1920) ; police or military protection for explosives in unaffordable (August 1920) ; discontinuance of Fog Signals at mainland Fog Signal Stations (January 1921) ; reduction of explosives on board Lightships (June 1921). Correspondents include Headquarters, Irish Command, British Army ; Inspector ; Lord Lieutenant; Under Secretary Dublin Castle ; Admiralty.

Files contain documents regarding removal of explosives at Loop Head by British Army during the Irish War of Independence, and a Raid carried out by the Irish Republican Army (Anti-Treaty) forces during the Civil War. Included below are extracts from reports by J. Crowley, Principal Keeper: May-June 1920: station visited by RIC and British Army to inspect stores of Explosives. Explosives were removed by British Army ; September 1920: explosives again removed by British Army ; 13 January 1923: Station raided by a party of armed and masked men at 11 pm. Telephone apparatus carried off. Included are details of all explosives at Fog-Signal Stations round the coast of Ireland on 1 February 1920; and Notice to Mariners re temporary discontinuance of Loop head Explosive Fog Signal.