The mode of construction of the Lake Stations of the marshes of Pomerania is very different from that employed in Switzerland or in Austria. The foundations rest on horizontal beams, kept in place either by great blocks of rock or by piles driven in vertically. In many cases notches had evidently been made, the better to place the cross-beams; whilst in others forked branches had been selected, so that a second branch could be fitted into the fork. Primeval man soon learnt to appreciate the solidity of such a combination. Do these stations, however, really date from prehistoric times? Virchow, returning to his first opinion, now thinks that the pile dwellings of Germany belong to the same epoch as the intrenchments known as _Burgwallen_, when metals and even iron were already in general use. They were inhabited until the thirteenth century, and it is easy to trace in them, as in those of Switzerland, the signs of the successive occupations, the dwellings having evidently been abandoned and restored later by fresh comers. [Illustration: 52.] Small terra-cotta figures, from the Laybach pile dwellings. At the meeting of the British Association at Newcastle in 1863, Lord Lovaine described a Lake Station in the south of Scotland, and Sir J. Lubbock mentions one in the north of England. Others are known at Holderness (Yorkshire), at Thetford, on Barton Mere, near Bury St. Edmunds; but judging from the description of them they are not of earlier date than the Bronze age. Other stations are more ancient. A few years ago a number of piles were found a little above Kew, beneath a layer of alluvium, and embedded in the gravel which formed the ancient bed of the Thames. All around these piles were scattered the bones of animals, of which those of the _Bos longifrons_ were the most remarkable. The long bones had been split to get out the marrow, an evident proof of the intelligent action of man. In London two similar examples were found on the site of the present Mansion House, and beneath the ancient walls of the city. They are supposed to date from times earlier, not only than the cutting out of the present course of the Thames, but before that invasion of the sea which preceded the formation of the Thames valley, now the home of more than four million men and women.