There is good reason for believing that, before this period, the Romans had a settlement to the north of the Grampians, of which Pteroton, hodiernally Inverness, was the capital. […] Sometime thereafter, whilst Ronald was on a pilgrimage to Jerusalem, Harold the Wicked, Earl of Orkney, spent the winter at Wick, and was robbed of the rents of his estates in Zetland by Swen the pirate, whose stronghold was at Lambsburgh, hodiernally Buchollie's Castle in Canis- bay, near the northern boundary of the parish of Wick.
Source: wiktionary