One style of black glass bead with trailed decorations became particularly popular in North America, and was associated with the great transcontinental incursions of Meriwether Lewis and William Clark at the beginning of the 19th century. The Lewis and Clark expedition carried with it a stock of beads for the purpose of smoothing its passage through territories hostile to outsiders. There is no record of whether the beads that now carry their name were in fact a part of Lewis and Clark’s cargo. Either way, the beads that the explorers offered did not have the desired effect, as the native peoples were interested primarily in plain blue beads. "Lewis and Clark" beads were much more successful when traded into West Africa, and it is from that region that the beads listed here have come to us.