Files contain documents re Signalling and Reporting at Tuskar Rock Lighthouse including: instructions received by J. Glanville, Principal Keeper Tuskar Rock Lighthouse, from Admiralty re communicating signals to War Signal Station ; Naval Signalmen accommodated at Tuskar Rock for purposes of communicating orders to the Auxiliary Patrol Vessels (January 1916-November 1917) ; request for an award for P. J. McGinley, Assistant Keeper, for providing information re submarine spotted off Tuskar (April 1917).

Files contain letters from J. J. Duff, Master of Coningbeg Lightship; and J. Murphy, Mate, with details of: wreckage sighted ; explosion under the Lightship (2 March 1917) ; lifeboat and gear picked up (March 1917) ; Captain and crew of Saltes Leigth Ship brought aboard after 4 days at sea (16 March 1917) ; crews from ships brought aboard following sinking by submarine attacks (1 October, 21 November 1917) ; Mine Sweepers exploding mines ; compensation for supplying clothing and provisions to crews of torpedoed vessels ; submarine sightings.

File contains letters from Edward McKenna and J. Twohig, Principal Keepers Drogheda North, with details of: cannon shots heard ; sightings of submarines.

File contains letters and telegrams from T. P. Murphy, Principal Keeper Fastnet. Included are details of: instructions from Admiralty to inform all British Ships that War has broken out (6 August 1914) ; instructions from Admiralty to inform all vessels proceeding to Queenstown (Cobh) to ask Old Head for the Swept Channel ; reporting Transports to War Signal Station Brow Head ; sighting of a possible submarine (May 1915) ; confidential Lloyd's Weekly Booklet to kept in Principal Keepers custody and destroyed by fire when next issue received.

File contains reports from Michael Polly, Principal Keeper Dunmore East, and J. Connolly, Assistant Keeper, of sighting several ships sunk in the area having been torpedoed or struck mines. Also included are details or crews being landed in Dunmore East.

File contains letters from H. Crowley, Principal Keeper Broadhaven, reporting sighting of suspicious object (May 1915) and sinking of SS 'Aranmore', torpedoed by German submarine (March 1916).

Files contain letters from R. H. James and J. W. Byrne, Principal Keepers Slyne Head; and W. Bird, Assistant Keeper, reporting suspicious vessel and crews of SS 'Atalanta' and Schooner 'Emma' landing safely following submarine attacks.

File contains letters from T. Faulkner and J. Grant, Principal Keepers Rathlin East, with details of: bodies picked on shores of Island (January 1915) ; SS 'Knightsgarth' abandoned following torpedo attack drifted onto rocks on Island (January 1917) ; torpedo striking rocks under Station and sinking of SS 'Andania'.

File contains letters from J. H. Lavelle, Principal Keeper Bull Rock; D. O'Donnell and James A. O'Connor, Assistant Keepers. Included are details of: sightings of submarines ; sighting of suspicious lights.

File contains letters from Charles O'Donnell, Principal Keeper St. John's Point (Donegal), regarding: accommodation for Chief Officer (Coast Guard) ; submarine sightings ; instructions for Lighting.

File contains letters from R. J. Duffy and J. Ryan, Principal Keepers Galley Head. Included are details of: reporting to Coastguard re lifeboats from torpedoed vessel SS 'Arabic' (August 1915) ; reports of dead bodies of two women washed ashore from 'Arabic' disaster (October 1915) ; report of cargo steamer sunk (September 1916) ; reports of Danger Signals flown by boats in distress (October 1917 and March 1918).

File contains letter from John Hamilton, Principal Keeper Sligo, reporting sighting of submarine (June 1917).

File contains letter from J. Glanville, Principal Keeper Tuskar Rock Lighthouse, reporting Captain and Crew of SS 'Cairns' of Glasgow landed on Rock at 5.30 am on 14 August 1915, their vessel having been sunk by shell fire from German Submarine.

File contains letters from William J. Duff, Master of Codling Lightship, with details of: sighting of suspicious vessels and submarine.

File contains reports from Henry Thomas Murphy, Principal Keeper Mine Head, and Henry Hammond, Principal Keeper, of submarine sightings and attacks on ships in the area.

Files contain letters and telegrams from F. Coupe, Principal Keeper Skelligs. Included are details of: Norwegian barque 'Superb' torpedoed (June 1915) ; rescue of two boat loads of survivors from Wreck of SS 'Marina' by signalling to passing ship with flags, fog gun and lights (October 1916) ; reward for rescue of crew of SS 'Marina' from Donaldson Bros Ltd. and Board of Trade ; shipwrecked crew of Norwegian Ship sunk by submarine landed on Rock and assisted by Keepers (August 1918).

File contains letters from R. O'Neill, Master of Skulmartin Lightship; and G. Conway, Mate, with details of: sightings of suspicious vessels ; sighting of submarine attack on three steamships (2 May 1917).

File contains request from Intelligence Officer Irish Command for enquiries to be made as to whether any persons have been observed prospecting for minerals on the islands off the Cork and Kerry Coast. Further includes request from Royal Irish Constabulary, relative to the alleged supply of petrol etc. to enemy submarines, for names of pensioners and others who have been in Irish Lights Service and now reside in or around Wexford. The list of names is provided. The file is marked 'Confidential'.

File contains letters from James Higginbotham, Principal Keeper Greenore; and T. Glanville, Principal Keeper Haulbowline, with details of: sightings of suspicious vessels ; reduction in power of Light.

Files contain letters and telegrams from L. Stocker, Principal Keeper Blackrock (Mayo); and W. E. Evans and W. H. Godkin, Assistant Keepers. Include are details of: crew of Schooner 'George & Mary' sunk by submarine arrived by small boat at Station (June 1915) ; submarine and suspicious vessel sightings ; services rendered to crew of HMS 'Paxton' who had spent 8 days in a lifeboat (May 1917) ; refund for provisions supplied to survivors of HMS 'Paxton' ; request by L. Stocker for a medal from Naval Authorities for a medal for his services to crew of HMS 'Paxton' ; Commissioners do no support claim for medal.

File contains letters from N. Murphy and James Rossiter, Masters of South Arklow Lightship; and E. Kearon, Mate, with details of: sightings of submarines and floating mines ; explosions heard.

File contains letters from W. Wafer, Master of Daunts Rock Lightship; and Admiralty, with details of: information re the moorings of the lightship ; proposal to establish telephonic communication between the Lightship and the mainland not proceeded with ; orders to discontinue submarine bells ; submarine sightings ; crews from ship brought aboard following sinking by submarine attack (23 April 1917).

File contains letter from W. J. Callaghan, Principal Keeper Tory Island, re reporting sighting of enemy submarine off Island (6 February 1915); and reports from William Snow, Assistant Keeper, of three shipwrecked crews landing at Island: SS 'Sebek' of Liverpool torpedoed on 21 April 1917, all 40 crew safely landed ; Norwegian Barque 'Acadia' boarded by German submarine crew on 23 April 1917 and sunk, crew of 19 safely landed ; SS 'Dromore' of Liverpool, 43 crew and Captain safely landed on 28 April 1917.

File contains letters from Thomas F. Ryan, Principal Keeper Blackhead, with details of: ships torpedoed and sunk near Station (February 1915 and December 1917) ; actions taken in reporting Enemy submarine (May 1918).