For at least two thousand years, then, we may say, the men who lived in the country of the Swiss lakes, and those of Northern Italy, adopted for the sake of security the custom of making their dwellings, not upon the solid ground, but upon platforms constructed with infinite trouble above the waters of the lake. And the way they set about it was in this wise: Having chosen their spot--if attainable, a sunny shore protected as much as possible from storms, and having a lake-bottom of a soft and sandy nature--they proceeded to drive in piles, composed of tree-stems taken from the neighbouring forests, from four to eight inches in diameter. These piles had to be felled, and afterwards sharpened, either by fire or a stone axe, then driven in from a raft by the use of ponderous stone mallets; and when we have said that in one instance the number of piles of a lake village has been estimated at from 40,000 to 50,000, the enormous labour of the process will be apparent. This task finished, the piles were levelled at a certain height above the water, and a platform of boards was fastened on with pegs. On the platform were erected huts, probably square or oblong in shape, not more than twenty feet or so in length, adapted however for the use of a single family, and generally furnished, it would appear, with a hearthstone and a corn-crusher apiece. The huts were made of wattle-work, coated on both sides with clay. Stalls were provided for the cattle, and a bridge of from only ten or twelve to as much as a hundred yards in length led back to the mainland. Over this the cattle must have been driven every day, at least in summer, to pasture on the bank; and no doubt the village community separated each morning for the various occupations of fishing, for hunting, for agriculture, and for tending the cattle. As may be imagined, these wooden villages were in peculiar danger from fire, and a very large number have suffered destruction in this way; a circumstance fortunate for modern science, for many things which had been partially burnt before falling into the lake have, by the coating of charcoal formed round them, been made impervious to the corroding influence of the water. Thus we have preserved their very grain itself, and their loaves or cakes of crushed but not ground meal. The grains are of various kinds of wheat and barley, oats, and millet.[14]