GRAND WAY NEAR PIKETON, OHIO. The Mound Builders possessed chains of fortifications reaching from the southern line of New York diagonally across the country, through Central and Northern Ohio to the Wabash. It would appear probable, therefore, that while they WALLS AT GRAN-CHIMU, PERU. advanced from the south it was from the north-east the savage races came who drove them south or exterminated them. At Marietta, Ohio, we find a combination of the cross and pyramid. (See p. 334, ante.) At Newark, Ohio, are extensive CROSS AND PYRAMID MOUND, OHIO. and intricate works: they occupy an area two miles square, embraced within embankments twelve miles long. One of the mounds is a threefold symbol, like a bird's foot; the central mound is 155 feet long, and the other two each 110 feet it length. Is this curious design a reminiscence of Atlantis and the three-pronged trident of Poseidon? (See 4th fig., p. 242, ante.) The Mound Builders made sun-dried brick mixed with rushes, as the Egyptians made sun-dried bricks mixed with straw; they worked in copper, silver, lead, and there are evidences, as we shall see, that they wrought even in iron. Copper implements are very numerous in the mounds. Copper axes, spear-heads, hollow buttons, bosses for ornaments, bracelets, rings, etc., are found in very many of them strikingly similar to those of the Bronze Age in Europe. In one in Butler County, Ohio, was found a copper fillet around the head of a skeleton, with strange devices marked upon it. Silver ornaments have also been found, but not in such great numbers. They seem to have attached a high value to silver, and it is often found in thin sheets, no thicker than paper, wrapped over copper or stone ornaments so neatly as almost to escape detection. The great esteem in which they held a metal so intrinsically valueless as silver, is another evidence that they must have drawn their superstitions from the same source as the European nations. Copper is also often found in this manner plated over stone pipes, presenting an unbroken metallic lustre, the overlapping edges so well polished as to be scarcely discoverable. Beads and stars made of shells have sometimes been found doubly plated, first with copper then with silver. The Mound Builders also understood the art of casting metals, or they held intercourse with some race who did; a copper axe it "cast" has been found in the State of New York. (See Lubbock's "Prehistoric Times," p. 254, note.) Professor Foster ("Prehistoric Races," p. 259) also proves that the ancient people of the Mississippi Valley possessed this art, and he gives us representations of various articles plainly showing the marks of the mould upon them.