America was indeed little behind Europe in the earlier stages of cavern research. A cabinet of the British Museum is filled with fossil bones obtained by Dr. Lund and M. Claussen from limestone caverns in Brazil, embedded in a reddish-coloured loam, under a thick stalagmitic flooring, and including, along with remains of genera still inhabiting the American continent, those of extinct monkeys. Human bones were also found in the same caves, but superficially, and seemingly of the present Indian race. But a fresh interest and significance have been given to such researches by the novel aspect of prehistoric archæology in Europe. The relations now established between the earliest traces of European man and the geological aspects of the great Drift formation, have naturally led to the diligent examination of corresponding deposits of the continent of America, in the hope of recovering similar traces there. Until recently, however, any supposed examples of American palæolithic art have been isolated and unsatisfactory. Colonel Charles C. Jones, in his _Antiquities of the Southern Indians_, notes the discovery in the Nacoochee valley, in the State of Georgia, of flint implements from the gravel and boulders of the drift, and in material, manner of construction, and appearance closely resembling the rough hatchets belonging to the Drift type. Other more or less trustworthy examples of a like kind have been reported; among which may be noted a large specimen, now in the collection of the Society of Antiquaries of Scotland, found at Lewiston, in the State of New York, at a great depth, when sinking a well. Implements of neolithic character, and even of modern type, have been produced, not only from Kansas and California gold-diggings, but from the volcanic tufa of the Pacific coast, overlaid by repeated volcanic deposits. In a terrace of modified drift, near Little Falls, Minnesota, an accumulation of quartz chips have been found; the supposed refuse of an ancient workshop. More definitely, Professor Aughey reports the discovery of rudely chipped flint arrow heads in the loess of the Missouri valley, beneath the bones of the mastodon; and the loess gravels of Ohio and Indiana, belonging unquestionably to the last glacial age, have disclosed what seem to be genuine palæoliths, pointing to the presence of the rational tool-maker during the close of the quaternary epoch of the North American continent.