Besides home products, articles are found that have come from a long distance, and no class of objects is more suggestive than those that prove the widely-extended system of barter that prevailed at one time among the Indians of North America. There are shells and shell ornaments found in Wisconsin which must have been taken there from the shores of the Gulf of Mexico; catlinite or red pipe-stone ornaments and pipes found in New Jersey that could only have come from Minnesota. Shell beads are often found in graves in the Mississippi Valley that were brought from the Pacific coast, and the late Dr. Leidy has described a shell bead, concerning which he states that it is the _Conus ternatus_, a shell which belongs to the west coast of Central America. This was found, with other Indian relics, in Hartman’s Cave, near Stroudsburg, Pennsylvania. Two small arrow-points found in New Jersey a year or more ago proved to be made of obsidian. These specimens could only have come from the far South-west or from Oregon, and the probabilities are in favor of the latter locality. It is not unlikely that objects like the above should find their way inland to the Great Lakes, and so across the continent and down the Atlantic coast. On the other hand, arrow-points could have had so little intrinsic value in the eyes of an Indian that we are naturally surprised that they should have been found so far from their place of origin. Obsidian has occurred but very rarely east of the Alleghanies, so far as I am aware. In the Sharples collection, at West Chester, Pennsylvania, is a single specimen, reported to have been found near that place, and a few traces have since been discovered in the uplands immediately adjoining these Delaware meadows, and really there is no reason to suppose that objects of value should not have passed quite across the continent, or been carried from Mexico to Canada. There were no vast areas absolutely uninhabited and across which no Indian ever ventured. It has been suggested that, as iron was manufactured in the valley of the Delaware as early as 1728, the supposed obsidian arrow-points are really made of slag from the furnaces, but a close examination of the specimens proves, it is claimed, this not to have been the case, and at this comparatively late date the making of stone arrow-points had probably ceased. Just when, however, the use of the bow as a weapon was discarded has not been determined, but fire-arms were certainly common in 1728 and earlier.