The singular correspondence between many of the weapons and implements of the Stone Period, in almost every quarter of the globe, has already been referred to; but there are not wanting many others presenting such national and local peculiarities as are worthy of careful noting and comparison. In this respect much still remains to be done for Scottish Archæology. A far more abundant store of materials, and a much larger class of intelligent and educated observers are required, before the subject can be placed in its true light as an elementary basis from whence to deduce the legitimate inferences involved in this branch of science. It will meanwhile help towards the establishment of a fixed nomenclature and the basis of more extended classification, as observers increase, to exhibit at one view the chief known varieties of the weapons and implements of the Scottish Stone Period. The rude and unshapely fragments of flint known by the name of Flint Flakes, and now recognised as specimens of the first stages of weapon manufacture of the period to which they belong, have only very recently fully attracted the attention of archæologists. The merit in this, as in so many other important elementary principles of the science, is due to the intelligence and sagacity of the antiquaries of Copenhagen, and the admirable facilities afforded by the liberality of the Danish Government. The flakes of flint, which are met with in considerable abundance, appear to have been struck off from a solid mass. They are ordinarily found from about one to six inches long, and frequently present a curved form, it being apparently a property of flint to flake off in this manner. Sometimes they occur in the simplest state; in other cases they are partially reduced to their intended form. But rude as they are, they are of the utmost value to us, from the insight which is thereby obtained into the process of manufactory of the primitive lance and arrow-head. It is obvious, from the frequent discovery of such among sepulchral deposits, that considerable value was attached to them; nor must we overlook the fact, that while flint is found in the greatest abundance both in Denmark and the south of England, there are many parts of Scotland where it is scarcely to be met with. Here, therefore, we discover the first traces of primitive trading and barter. The flint flakes were, in fact, the _raw material_, which had to be imported from other districts before the hunter of the Stone Period could supply himself with the indispensable requisites for the chase. A few examples will suffice to shew the abundance of such materials, and the circumstances under which they are found, though it will readily be believed that it is only rarely that their occurrence is noted, or falls under the observation of those who consider them of the slightest value.