 Maclean (1972) further suggests that the Dutch may have simply made a cartographical error, and confused Hirta with Skildar, the old name for Haskeir island much nearer the main Outer Hebrides archipelago. Quine (2000) hypothesises that the name is derived from a series of cartographical errors, starting with the use of the Old Icelandic Skildir ("shields") and appearing as Skildar on a map by Nicholas de Nicolay (1583). This, so the hypothesis goes, was transcribed in error by Lucas J. Waghenaer in his 1592 charts without the trailing r and with a period after the S, creating S.Kilda. This was in turn assumed to stand for a saint by others, creating the form that has been used for several centuries, St Kilda.
