Currently researching **U-boat World War 1** activity on the west coast of Ireland.  Attached is a copy of Defence of Realm Act Nov 1914. 

Source: http://www.nationalarchives.gov.uk/pathways/firstworldwar/first_world_war/p_defence.htm 

Also attached is a copy of a Petty Court Session in Mayo 1918, Steelaun where a relative of mine was fined for having a light in her house visible during sunset and sun rise in contravention of realm act.  There was U Boat activity all around this coast line area. There is also anecdotal info on U Boats stopping at lighthouses, isolated inlets along coast etc. for fresh supplies as bread, milk from sympathetic parties?

Please note electrifcation did not occur until the late 1940S

https://esbarchives.ie/2017/09/18/electrifying-ireland-how-esb-connected-one-million-irish-homes-to-the-national-grid-1929-1978/ [![enter image description here][1]][1]

I am seeking an example of a sighting of a U boat in the Achill / Belmullet / Killala region of Mayo 1914 - 1918 .[![Petty court mayo 1918][2]][2]


[![Def of Realm 1914][3]][3]


  [1]: https://i.sstatic.net/UpeEK.jpg
  [2]: https://i.sstatic.net/s9VNC.jpg
  [3]: https://i.sstatic.net/GE5fA.jpg