Cincinnati, some well-made arrow-heads, the work of Dr. H. H. Hill, who informed me that his sole implement was the bone handle of a tooth-brush. Among the many interesting disclosures due to the researches of Messrs. Squier and Davis, was the discovery in a mound of “Clark’s Work,” one of the largest earthworks in the Scioto Valley, of what may fairly be regarded as a magazine of such flint-blocks, fresh as from the quarry. Many of them are half a foot in length, but they vary in size and shape. Out of an excavation six feet long by four wide, nearly six hundred were taken. They lay regularly stacked, edge-ways, in two layers, one above the other; and the explorers estimated that the whole deposit might amount to four thousand discs of hornstone, roughly prepared for future manufacture. [Illustration: FIG. 8.—Flint Implement, Licking County, Ohio. (1/1).] Blocks of flint from ten to twelve inches in length, fashioned in like manner into the nucleus of a lance or spear-head, have occurred from time to time in Denmark, France, and Belgium; and are to be looked for elsewhere: since implements of flint are common in many localities where the material out of which they are fashioned is wholly unknown. Those are rightly conjectured to be the raw material, which, like pig-iron, was thus ready to be turned to the special uses of the artificer. No doubt, by barter and traffic in various ways, such material for the flint-workers of Europe’s and America’s different stone periods was disseminated from centres where native flint occurs; just as in the later copper and Bronze periods of both continents the prized metals were diffused through remote areas. But it is only in localities where the flint abounds that implements, or even blocks or nuclei, of the largest size are of common occurrence. Fig. 8 represents one of the class of smaller rudely shaped flint implements recovered from a large mound in the vicinity of Newark. It indicates, alike in the discoloration and the change of the dulled surface, characteristic evidences of considerable antiquity. Thus buried in the mounds, or scattered about in the furrows of every ploughed field, slender flint-chips, knives, or spawls, with arrow-heads, axes, and other relics both of the Mound-Builders and their Indian successors, abound. The huge rough-hewn block of flint or hornstone takes its place as fittingly beside the delicately finished implements, as the prized lump of unwrought hæmatite, the large pyrula, or even the mass of copper or galena. Possibly they were deposited in the sepulchral mound to furnish to the dead the materials from which to fashion implements adapted to the new life on which he was about to enter. More probably, however, they were laid there simply as part of the ordinary furnishings adapted to the daily experiences of life. But if the Palæolithic tool-maker fashioned anything akin to the more delicate implements, the