Traders may have gone to distant regions to select and barter for raw materials, to the Lake Superior region for copper, to Ohio for pipestone, to the south Atlantic and Gulf Coasts for the small Marginella and Oliva shells, for the larger Cassis and Busycon shells, and to the Yellowstone or Mexico for obsidian (of which little is found in Illinois graves). Trade, to some degree, removes the limitations imposed by the immediate surroundings. Pearls were secured in quantity from the clams of the native streams. Bone, antler, tortoise and clam shell, bears’ teeth, bear, wildcat and wolverine jaws from their hunting and collecting pursuits were utilized more fully than ever before. Even human jaws, possibly of enemies, were cut, polished and bored for use as pendants. Though the Hopewellians may not have been the pacifists they are sometimes painted, there must have been long periods of peaceful relationships with distant and nearer neighbors with whom they traded or through whose territories their traders had to pass. Whether or not a condition of peace was maintained within the borders of their culture area by the force of arms is an interesting question that cannot now be answered. [Illustration: Fig. 18. The Hopewellian assemblage of artifacts that collectively identify the Hopewellian (Classic Woodland) period and, except for shell spoon, turtle shell dish, and some bead types, distinguish it from the other Woodland assemblages. A, drinking cup of marine shell (_Cassis madagascarensis_); B, C, D, Hopewellian pottery (restored); E, mussel shell spoon with “handle”; F, turtle shell dish; G, sheet mica (mirror?); H, antler headdress; I, J, platform pipes with effigy mammal bowls, polished stone (Otter and bear’s head, eyes set with copper pellets); K, platform pipe (plain bowl), curved base, polished stone; L, copper earspools or ornaments, pair; M, imitation bear tooth, copper; N, (Below) N₁, Bear jaw, cut in half, ground and drilled to be worn as a double pendant; (Above) N₂, Fragment of a human jaw that has been similarly treated; O, copper hatchet that carries imprint of textile on its surface; P, copper adze; Q, R, Hopewellian spearheads; S, massive bead of copper; T, bracelet of copper beads; U, necklace of pearls; V, necklace of copper beads; W, necklace of graduated ground shell beads from columella (central column) of marine shell.]