 Skerryvore ( from the Gaelic An Sgeir Mhòr meaning " The Great Skerry " ) is a remote reef that lies off the west coast of Scotland , 12 miles ( 19 kilometres ) south @-@ west of the island of Tiree . Skerryvore is best known as the name given to the lighthouse on the skerry , built with some difficulty between 1838 and 1844 by Alan Stevenson . 
