Gaelic spelling varies, even between contemporary sources such as the Sailing Directions, OS Maps and Admiralty charts. Even Gaelic dictionaries cannot always be relied on. This is a nightmare, particularly for me as a very bad speller, noted in my very first school report aged seven. The variation seems largely due to translation from Gaelic (which really does have difficult spelling) into English over the years. So is it mor, or mhor, or vhor, all I think meaning big? If there is a Gaelic speaker or scholar out there, do get in touch and put me right. Sometimes the variation seems just plain whimsical. But one should not be surprised. Scottish Gaelic, which probably developed from the Irish Gaelic, was not really a written language until the 17th century. As late as 1773 Samuel Johnson observed "Whoever therefore now writes in this language, spells according to his own perceptions of the sound, and his own idea of the power of the letters" (A Journey to the Western Islands of Scotland. Samuel Johnson, 1775, Ed RW Chapman, Oxford University Press, 1970).