The Neolithic Age in the Ægean has now been abundantly illustrated from the yellow bottom clay at Knossos, and its products do not differ materially from those implements and vessels with which man has everywhere sought to satisfy his first needs. The mass of the stone tools and weapons, and the coarse hand-made and burnished pottery, might well proceed from the spontaneous invention of each locality that possessed suitable stone and clay; but the common presence of flaked blades, arrow-heads, and blunt choppers of an obsidian, native, so far as is known, to Melos only, speaks of inter-communication even at this early period between many distant localities and the city whose remains have been unearthed at Phylakopi. The wide range of the peculiar cist-grave strengthens the belief that late Stone Age culture in the Ægean was not of sporadic development, and prepares us for the universality of a certain fiddle-shaped type of stone idol. Local divergence is, however, already apparent in the relative prevalence of certain forms: for example, a shallow bowl is common in Crete, but not in the Cyclades, while the _pyxis_, so common in the graves of Amorgos and Melos, has left little sign of itself in Crete; and from this point the further development of civilisation in the Ægean area results in increasing differentiation. The Greek mainland has produced as yet very little of the earlier periods (the excavators of the Heræum promise additions); but the primitive remains in the rest of the area may be divided into four classes of strong family likeness, but distinct development. The pottery supplies the best criterion, and will suffice for our end. We have no such comprehensive and certain evidence from other classes of remains. Except for the Great Treasure of Hissarlik, and the weapons in Cycladic graves, there have been found as yet hardly any metal products of the period. Of the few stone products, one class, the “island idols,” already referred to, was obviously exported widely, and supplies an ill test either of place or date. There have not been discovered sufficiently numerous structures or graves to afford a basis of classification. Fortified towns have been explored in Melos, Siphnos, and the Troad, and a few houses in Ægina and Thera; but neither unaltered houses nor tombs of undoubted primitive character have appeared in Crete as yet, nor elsewhere than in the Cyclad isles.