remote rock west coast scotland lying miles west miles south west lighthouse designed tower height feet erected shore station constructed isle rock subject extraordinary sea conditions waves feet encountered keepers despite adverse conditions men served light lengthy periods automated official lighthouse known interpretations provided original meaning black rock likely geology pre historic times covered ice sheets spread scotland atlantic_ocean outer retreat ice years ago sea levels feet lower present rise land makes estimating post glacial coastlines complex task circa likely western edge large land bridge linking island ireland scotland land mass included islands probably connected mainland scotland near south steadily rising sea levels slowly isolated finally submerged today rounded dark green mass rock called feet long feet wide rises feet sea level submarine surveys indicate rock eastern end valley stretching miles atlantic account seemingly abnormal seas tower subjected isolated outpost author wrote ugly reef pleasant shelves pools creeks child play summer like oval black trap sparsely alive insect bug life sea birds sea ran like mill race outer reef weather rock meaning translation black rock obsolete word rock rocky ground irish variation forms simple case false splitting final pronunciation seemingly following word suggesting ear believed black dismal translation noting usual 7th century life calls rock black stack west watson suggests root old irish meaning death believes occurs main island archipelago offers meaning black deadly known prior construction lighthouse planning construction lighthouse thirty ships wrecked reef requirement lighthouse warn away guide past lie ross originally considered impossible site light loss steamer thirty hands maiden voyage astonishing vessels area storm december encouraged positive action pressure captain admiralty engineering work supervised famous family engineers brothers thomas father david commencing work thomas noted work ordinary magnitude land base construction light near fourteen miles distant open sea little island provided granite quarry shore station work lighthouse completed initial construction rock began june supervision required iron summer brought high seas resulted breaking water falling roof feet sea level held firm fourteen men including trapped days point poured exited remaining food supplies describing similar occasion wrote men sat high iron drum builder rock habit strike human amid music storms despite hardships foot diameter foundation pit excavated solid portion tower rising feet foundation level completed mean feat occasion ton stones course stonework carried rock seen noted destruction occurred height sea glass lighthouse solid base weighing tons rises feet pounding seas twice high nearest british rival blocks having shaped fitted towed rock barges steamer barge carrying tons masonry work completed optical apparatus fog bell installed following year isolated rock light britain use finished tower rises feet foundation seventy seven courses stonework told total cost works undertaken excluding cost establishing shore station extraordinary nature work reduced mere numbers moved note great dangerous work like brought unsuccessfully end praise given men resident superintendent captain steamer master builder rock landing master justice list longer add took lives hand finish turned common history early operations completion construction work result end hazards low tide landing stage feet boat completely reach swell landings use ropes unusual calm days storm seas rise extraordinary heights year operation copper lightning conductor storm height feet high water principal keeper looked light years despite exceptionally adverse conditions faced keepers resulted receiving additional payments kind served light decade found lonely rock cramped quarters taste prevented diving sea attempting swim ashore later events principal keeper reported incident suggested rock experienced earth tower stood fast connection construction shore station played significant novel kidnapped main character experiences dangers rocks distinctive red band painted round middle section tower distinguish miles northwest served shore station dispute concerning financing led visit prominent persons including president chancellor sir lighthouse changed present form reasons clear arguably easier spell lighthouse fully automated following year constructed enable maintenance work undertaken need sea landings
Dubh Artach