Before proceeding to examine in detail the varied contents of the Scottish tumuli, it may be well to glance at the evidence we possess of the nature of the habitations reared and occupied by the constructors of such enduring memorials of their dead as have been described in the preceding chapter. Scattered over the uncultivated downs both of England and Scotland, there still remain numerous relics of the dwellings of our barbarian ancestry, which have escaped the wasting tooth of centuries, or the more destructive inroads of modern cultivation. Sir Richard Colt Hoare remarks, in his "Ancient Wiltshire,"--"We have undoubted proofs from history, and from existing remains, that the earlier habitations were pits, or slight excavations in the ground, covered and protected from the inclemency of the weather by boughs of trees and sods of turf." Of these primitive pit-dwellings numerous traces are discernible on Leuchar Moss, in the parish of Skene, and in other localities of Aberdeenshire; on the banks of Loch Fine, Argyleshire; in the counties of Inverness and Caithness; and in various other districts of Scotland still uninvaded by the plough. They are almost invariably found in groups, affording evidence of the gregarious and social habits of man in the simplest state of society. The rudest of them consist simply of shallow excavations in the soil, of a circular or oblong form, and rarely exceeding seven or eight feet in diameter. Considerable numbers of these may be observed in several districts both of Aberdeenshire and Inverness-shire, each surrounded with a raised rim of earth, in which a slight break generally indicates the door, and not improbably also the window and chimney of the aboriginal dwelling. To this class belong the "pond barrow," already referred to as erroneously ranked among sepulchral constructions. Within a few miles of Aberdeen are still visible what seem to be the remains of a large group, or township, of such rude relics of domestic architecture. These, Professor Stuart suggests, may mark the site of the capital of the Taixali, when the Roman legions passed the river Dee in the second century.[91] They consist of some hundreds of circular walls scattered over more than a mile in extent, of two or three feet high, and from twelve to twenty feet in diameter. Their varying sizes may be presumed to indicate the gradations of rank which, we know, were established among the northern Britons, who were undoubtedly, at the period of the Roman invasion, a race far in advance of the first constructors of the rude pit-dwelling or "pond barrow" previously referred to. Nothing, however, has yet been discovered on this site to indicate any traces of Roman influence. On digging within the area of the pit-dwellings, a mass of charred wood or ashes, mingled with fragments of decayed bones and vegetable matter, are generally found; and their site is frequently discernible on the brown heath, or the