Whether man did or did not live in the basin of the Delaware at the most remote times of which we have any knowledge, we meet with traces of his occupation in the same latitude at more recent periods. At Long-Nick-Branch is a shell-mound that extends for half a mile, and in California there is a yet larger kitchen-midding. It measures a mile in length by half a mile in width, and, as in similar accumulations, excavations have yielded thousands of stone hammers and bone implements (Fig. 24). The shell-mounds of which we have so far been speaking are all near the sea, but there is yet another consisting entirely of marine shells fifty miles beyond Mobile. This fact seems to point to a considerable change in the level of the ground since the time of man’s first occupancy, for he is not likely to have taken all the trouble involved in carrying the mollusca necessary for his daily food so far, when he might so easily have settled down near the shore. I cannot close this account of the kitchen-middings, without calling attention to two very interesting facts. The importance of these mounds bears witness alike to the number of the inhabitants who dwelt near them, and the long duration of their sojourn. Worsaae sets back the initial date of the most ancient of the shell-mounds of the New World more than three thousand years. This is however a delicate question, on which in the present state of our knowledge it is difficult to hazard a serious opinion. It is easier to come to a conclusion on other points: the close resemblance, for instance, between the kitchen-middings of America and those of Europe. In both continents we find the early inhabitants fed almost entirely on fish; their weapons, tools, and pottery were almost identical in character; and in both cases the characteristic animals of Quaternary times had disappeared, and the use of metals still remained unknown. Are these remarkable coincidences the result of chance, or must we not rather suppose that people of the same origin occupied at the same epoch both sides of the Atlantic? The man of the kitchen-middings evidently had a fixed abode. Long since, the tent, the temporary shelter of the nomad, had given place to the but. We have already said what this but may have been like, but the most certain data we have as to human habitations at this still but little known epoch, are those supplied by the Lake Stations of Switzerland, and it is to our own generation that we are indebted for the first discoveries relating to them.