Many of the flint implements are finished with exquisite delicacy, to the finest serrated edge; while, no doubt owing to the abundant material, they are frequently on a scale considerably surpassing those of the European neolithic period. In the collections of Dr. Hill, Dr. Byrnes, and Mr. Hosea, of Cincinnati, I made drawings of flint-knives, spear-heads, and hoes, measuring nearly eleven inches in length. Fig. 9 shows an example of the latter implement, reduced to one-third, linear measure. It was found by Dr. Hill, on the river edge of the Ohio, near Smithland, Kentucky, and fully illustrates the character of the flint hoe. The broad end has been worked to an edge, and is fractured from use; while the narrow end terminates in a flat unworked surface, showing the natural texture of the nodule from which it has been made. The same collections above referred to include spear-heads of dark hornstone, from 6½ to 7 inches long, of which upwards of fifty were found on a farm in Casey County, Kentucky. On another farm in Jackson County, Indiana, the owner’s curiosity was excited by the large size of two or three spear-heads of dark grey hornstone turned up by the plough; and on digging down he found about ninety stacked edge-ways, one tier above another. Specimens of them examined by me in different collections measured from 4½ to 5 inches long. One of the smallest of them is figured here full size, Fig. 10. Along with some of these large spear-heads, Dr. Hill produced several beautifully finished leaf-shaped blades, chipped to a fine edge, measuring upwards of 5 inches long. They are worked in a pale grey hornstone speckled with white. Twelve of these were ploughed up in a level between two large mounds, near Brookville, Indiana; and ten perfect, with numerous broken specimens of a rarer type of large arrow-head, equally well finished, were found in the vicinity of another mound, near Anderson’s Ferry, a few miles below Cincinnati. The number of such implements in this region is astonishing; and frequently the beauty of a piece of milky-quartz, yellow chert, or pure rock crystal, appears to have stimulated the workman to his utmost dexterity in the manufacture of serrated, dentated, and elaborately finished blades of various forms. [Illustration: FIG. 10.—Flint Spear-head, Indiana. (1/3).]