believed--in the vicinity of the Royal Halls of Westminster, or in the vicinity of the Royal Halls of Tara? What ancient people, destitute apparently of metal tools and of any knowledge of mortar, built the gigantic burgs or duns of Mousa, Hoxay, Glenelg, Carloway, Bragar, Kildonan, Farr, Rogart, Olrick, etc., with galleries and chambers in the thickness of their huge uncemented walls? Is it true, as the Irish bardic writers allege, that some of the race of the Firbolgs escaped, after the battle at one of the Moyturas to the Western Islands and shores of Scotland, and that thence, after several centuries, they were expelled again by the Picts, after the commencement of the Christian era, and subsequently returned to the coast of Galway, and built, or rebuilt, there and then, the great analogous burgs of Dun AEngus, Dun Conchobhair, etc., in the Irish isles of Aran?[10] What is the signification of those mysterious circles formed of diminishing concentric rings which are found engraved, sometimes on rocks outside an old aboriginal village or camp, as at Rowtin Lynn and Old Bewick; sometimes on the walls of underground chambers, as in the Holm of Papa Westray, and in the island of Eday; sometimes on the walls of a chambered tumulus, as at Pickaquoy in Orkney; or on the interior of the lid of a kistvaen, as at Craigie Hall, near Edinburgh, and probably also at Coilsfield and Auchinlary; or on a so-called Druidical stone, as on "Long Meg" at Penrith? Is it true that a long past era--and, if so, at what era--our predecessors in this old Caledonia had nothing but tools and implements of stone, bone, and wood? Are there no gravel-beds in Scotland in which we could probably find large deposits of the celts and other stone weapons--with bored and worked deer-horns, of that distant stone-age--such as have been discovered on the banks of the Somme and the Loire in France? And were the people of that period in Scotland Celtic or pre-Celtic? When the first wave of Celtic emigrants arrived in Scotland, did they not find a Turanian or Hamitic race already inhabiting it, and were those Scottish streams, lakes, etc., which bear, or have borne, in their composition, the Euskarian word _Ura_ (water)--as the rivers Urr, Orr, and Ury, lochs Ur, Urr, and Orr, Urr-quhart, Cath-Ures, Or-well, Or-rea, etc., named by these Turanian aborigines?