Dun Mac Uisneachan, in Loch Etive, was described by Dr. Maculloch in 1824, and more recently by Dr. R. Angus Smith, who made extensive investigations of the area of the fort in 1873-4.[102] It occupies the top of an oblong hill which is either very steep or actually precipitous on all sides. The area enclosed is about 250 yards long by 50 yards broad. It is encompassed on the verge of the hill by a wall which is still in some places from 5 to 6 feet high. The points made out by the investigation are thus stated by Dr. Angus Smith—(1) the weaker parts of the dun or defensible position were walled, the outer wall or part of wall being vitrified; (2) the wall of the western part is double; the outer being vitrified, the inner built in layers of flat stone, 9 feet being the distance from surface to surface; (3) the walls were built without mortar as in all these forts; (4) vitrified portions of walling were found overlying portions built in the ordinary manner and unvitrified. This I regard as the most interesting and important point ascertained by Dr. Angus Smith’s investigations regarding the construction of the so-called Vitrified Forts. It shows distinctly that the wall of a Vitrified Fort is not always, and in every part, a vitrified wall; and it suggests that instead of taking this for granted, in every case in which signs of vitrifaction are observed, the inquiry ought to be directed to the determination of the extent of such partial vitrifaction, wherever it is found to have been partial. Another interesting result of his researches was the discovery of the remains of dwellings within the area of the fort. They were rectangular constructions, having dry-built walls about 2 feet thick. A large refuse-heap of bones of the common domestic animals was found near them. Some querns, a portion of an iron sword, an iron ring about 2 inches diameter, and a convex plate of bronze 1¼ inch diameter, ornamented with concentric circles, the hollows of which were filled with red and the centre with yellow enamel, were found in the course of the excavations. The character of this relic, with its red and yellow enamels, is closely allied to that of the similarly enamelled bronzes which have been already described, some of which have been found in constructions of a very peculiar type which have yet to be noticed. ----- Footnote 102: _Proc. Soc. Antiq. Scot._, vol. ix. p. 396, vol. x. p. 70, vol. xi. p. 298, and vol. xii. p. 13. -----