Turning to foreign countries, the discovery of flint instruments of this class, ground at the edge only, or on some small portions of their surface, is, as has already been observed, not uncommon in France and Belgium. In Denmark they are also very abundant, but the most common Danish form with a thick rectangular section does not appear to occur in Britain. Among the North American stone hatchets, many present this feature of being ground at the edge only, and the same is the case with some of the tools of the native Australians, such as that engraved in Fig. 105. A rough celt from Borneo, ground at the edge only, has been engraved by General Pitt Rivers.[328] The type also occurs in India and Japan. In all European countries instruments of this form and character, but made of other materials than flint, are, like those entirely unground, of very rare occurrence. This rarity may arise from two causes, the one, that the tools or weapons made of these materials have not so sharp a cutting edge produced by chipping only as those formed of flint; and the second, that being usually somewhat softer than flint it required less time and trouble to grind them all over. None of the rough celts, nor those ground at the edge only, seem so well adapted for use as hand-tools without a haft, as do some of those which are polished all over. Looking, however, at some of the rough Australian tools which are hafted with gum in a piece of skin, and thus used in the hand, it is hardly safe to express a decided opinion. The majority were, notwithstanding, in all probability, mounted with shafts after the manner of axes or adzes. |98| CHAPTER VI. POLISHED CELTS. The last of the three classes into which, for the sake of convenience of arrangement, I have divided these instruments, viz., that comprising the celts ground or polished, not only at the edge, but over a great portion, or the whole, of their surface, is also that which is usually most numerously represented in collections of antiquities. Whether this excess in number over the other classes arises from the greater original abundance of these polished implements, or from their being better calculated to attract observation, and, therefore, more likely to be collected and preserved than those of a less finished character, is a difficult question. From my own experience it appears that, so far as relates to the implements of this character formed of flint, and still lying unnoticed on the surface of the soil, the proportions which usually obtain in collections are as nearly as may be reversed, and the chipped, or but partially polished, celts are in a large majority. Among the polished celts there is a great range in size, and much variation in form, though the general character is in the main, uniform. The readiest method of classification is, I think, in accordance with the section presented by the middle of the blade, and I, therefore, propose to arrange them as follows:—