Dr. John Alexander Smith has discussed this point fully in his exhaustive notice of these Stone Balls in _Proc. Soc. Antiq. Scot._, pp. 56-62. Dr. John Evans remarks that “it seems probable that they were intended for use in the chase or in war when attached to a thong which the recesses between the projecting discs seem well adapted to receive.” He also states that "these Scottish Stone Balls seem to belong to a recent period, as compared with that to which many other stone antiquities may be assigned."—_Ancient Stone Implements, etc., of Great Britain_, pp. 377-379.
But whatever may have been their special purpose or the precise manner of their use, it is of greater importance for the purposes of our inquiry that we should be able to determine their typical relations and ascertain the area to which they are confined. It is clear that they possess a typical form which has no distinctly definable relations with any other class of stone implements. The type is so peculiar and so strongly marked, that if it exists anywhere out of Scotland we should probably have known of its existence. But, with a single exception, said to have been found in Ireland, there is no record that I can discover of the occurrence of any specimen beyond the bounds of Scotland. Within that area it is widely diffused. There are so many specimens in private hands of whose localities we possess no record, that it is impossible to ascertain with any degree of precision the relative frequency of their occurrence in different districts of the country. But their known range comprehends an area which is but little short of the whole area of Scotland. They are most abundant in the north-eastern districts, but they occur as far north as Caithness and Orkney, as far south as Dumfries, and as far west as Argyle. Whether they belong wholly to the Pagan time or partly to the Christian period, it is clear that the prevailing features of their decoration, though distinctly Celtic in character, are not those of the fully developed style of Celtic ornament which prevailed throughout the early Christian time. Nor does it possess the most striking characteristics of the decoration of these objects in metal, of which so many characteristic examples have now been given. But the zoomorphic ending of the spiral pattern on the bronze ball from Lanarkshire, and the double and escaping spirals of the Towie, Elgin, and Glasterlaw specimens, are sufficiently distinctive to claim for them a place in the same system of design which produced the peculiar patterns of the Pagan period, and developed from them the more elaborate systems of decoration so widely applied in the early Christian art of Scotland.