Some singularly interesting information relative to the traces of the ancient flint-workers in the Ohio valley, is furnished by Mr. Sellers. His observations were made when that region still remained, to a large extent, undisturbed by civilised intruders on the deserted Indian settlements. He notes many places along the banks of the Ohio and its tributaries, at an elevation above the spring floods except at rare intervals of violent freshets, where the flaking process of the old flint-workers had been extensively carried on, and where cores and waste chips abound. “At one of those places, on the Kentucky side of the river,” he says, “I found a number of chert blocks, as when first brought from the quarry, from which no regular flakes had been split; some had a single corner broken off as a starting-point. On the sharp right-angled edge of several I found the indentations left by small flakes having been knocked off, evidently by blows, as a preparation for seating the flaking tool. Most of the localities referred to are now under cultivation. Before being cleared of the timber and subjected to the plough, no surface relics were found, but on the caving and wearing away of the river banks, many spear and arrow heads and other stone relics were left on the shore. After the land had been cleared, and the plough had loosened the soil, one of the great floods that occur at intervals of some fifteen or twenty years, would wash away the loose soil, leaving the great flint workshops exposed.” There, accordingly, he notes among the materials thus brought to light, the cores or nuclei thrown aside, caches stored with finished and unfinished implements and flakes, the tools and wastage, vast accumulations of splinters, etc., all serving to illustrate the processes of the ancient flint-workers.