The Stones of Stennis, already referred to as the Orcadian Stonehenge, are unquestionably the most remarkable monolithic group in Scotland, and, indeed, if we except the great temple of Salisbury Plain, in the British Isles. Without entering meanwhile into any investigation of the evidence which various writers have derived from northern mythology or popular traditions, with a view to throw some light on the probable date of their origin, or the character of their builders, it furnishes a rational basis for the classification of such ancient monuments among the remains of the Primeval Period, that they exhibit no indication of having been hewn or shapen with tools. Unless the perforation of the stone of Odin be an exception, the columns have been erected just as they were dislodged from the earth; and we have only to account for their separation from the parent strata and their erection on the site which they still occupy. In this respect they correspond with the more ancient English temple of Avebury rather than with that of Stonehenge, which belongs to an era when efficient metallic tools, whether of bronze or iron, must have supplied the means of hewing the gigantic columns into some degree of uniformity, and fitting the lintels to the upright columns by means of the mortice and tennon still discoverable amid the ruins of that wonderful monument of ancient skill. We are not altogether without some evidence to induce the belief that the early Caledonian did dislodge and cleave into amorphous columns the unquarried rocks with which his native soil abounded, when armed with no fitter tool than the stone wedge and hammer. The Rev. James Little, in furnishing Sir John Sinclair with an account of the antiquities of the parish of Southwick, in Kirkcudbright, mentions the discovery, on the estate of Southwick, "in the middle of a large granite stone, when blasted with gunpowder, in a socket exactly fitted to it, of a piece of the same kind of substance, smooth and polished, in form somewhat resembling a rude hatchet, about nine inches long. The virtuosi to whose inspection it was submitted did not hesitate immediately to pronounce it to be a hatchet which had been used by the Druids in performing sacrifices; which conjecture they imagined warranted by the vestiges of a Druidical temple very near where it was found."[132] The reverend Statist rather inclines to regard it as a _lusus naturæ_. A few years later another was found, under similar circumstances, in a cavity of an enormous mass of stone, on the farm of Mains, near Dumfries. It was also of polished granite; and from the outline of it in the Archæologia, no doubt can be entertained of its being a genuine stone wedge or celt.[133] Still it is not meant to assume from this that all such monuments were erected prior to the introduction of metals, but only that they indicate an origin coeval with the state of civilisation in which the use of metallic implements was, at best,