That long, narrow, and irregular island, usually called the Main-Land of Zetland, because it is by far the largest of that Archipelago, terminates, as is well known to the mariners who navigate the stormy seas which surround the Thule of the ancients, in a cliff of tremendous height, entitled Sumburgh-Head, which presents its bare scalp and naked sides to the weight of a tremendous surge, and forms the extreme point of the isle to the south-east.
1822, [Walter Scott], chapter I, in The Pirate. […], volume I, Edinburgh: […] [James Ballantyne and Co.] for Archibald Constable and Co.; London: Hurst, Robinson, and Co., page 3