It is often the case that antiquarian remains owe their discovery to the mere accident of agricultural operations, peat-cutting, drainage, etc. Such operations are, however, usually confined to small lakes and bogs. The idea of partially lowering the surface of the extensive sheets of water in the Jura valley, comprising the lakes of Bienne, Neuchâtel, and Morat, was too chimerical to be ever entertained in the interests of archæology. But what was inconceivable and utterly beyond hope from this point of view, became, in the interests of agriculture, not only a practical problem, but is now an accomplished fact. Between the lakes of Bienne, Neuchâtel, and Morat, there stretches a vast mossy district known as the "Gross Moos," through which the combined surplus water of the two latter lakes finds its way to the former. From the north end of Lake Bienne the surplus water again emerges, and is conveyed by the Zihl or Lower Thielle in a sluggish channel for some miles farther down the valley, where, before the Correction des Eaux du Jura, it united with the Aar. As the surface of these lakes is nearly on the same level, it is more than probable that in early prehistoric times their waters formed one united sheet, which in the course of ages became separated into three lakes by the interposition of the sedimentary and peaty deposits now forming the Gross Moos. Their connecting channels, the Broye and the Upper Thielle, owing to the sluggishness of the flow, became gradually raised by the constant deposition of mud, thus proportionately raising the level of the confined waters, and consequently rendering the surrounding lands more and more liable to submergence. Also, the river Aar, though passing quite in the vicinity of the lake of Bienne, went a long way beyond it before joining with the Zihl, and often caused great havoc by flooding the richly-cultivated lands of the lower grounds.
To remedy these defects the Swiss Government entered on the gigantic project of rectifying and deepening the entire waterway from the junction of the Lower Thielle with the Aar to the mouth of the Broye in Lake Morat. The scheme also included the cutting of a new channel for the Aar, by means of which it would be entirely diverted from its old course, and made to debouch into Lake Bienne by a straight and much shorter route. (See Sketch Map, [page 23].)
The hydrographical result of these works (which were begun in 1868, and only completed a few years ago) was to lower the surface of these lakes to the extent of six or eight feet. In the winter of 1871-2 the operations began to tell on Lake Bienne, but it was some years later before the others became sensibly affected. When, however, the works were completed, the permanent effect on these lakes, especially on Lake Neuchâtel, was very marked—harbours, jetties, and extensive tracts of shore-land being left high and dry by the subsiding waters. This was the harvest-time of archæology. Many of the lacustrine abodes became dry land, and were visited by crowds of eager searchers; even fishermen forsook their normal avocations, finding it more profitable to fish for prehistoric relics. Government at last interfered with this indiscriminate "howking," and passed a law restricting the privilege of excavating to the authorities of the respective Cantons on whose territories the stations happened to be. Thus the "Correction des Eaux du Jura," as the undertaking was called, greatly facilitated the investigations of the Swiss lake-dwellings, and contributed enormously to the elucidation of the culture and civilisation of their inhabitants.
In the following descriptive notes of the stations in Lake Bienne I follow simply the order of their distribution along its shore, making, as it were, a circular tour of the lake, beginning at Nidau, and passing along its southern shore, then round to the other side, until we come back to our starting-point.
Nidau-Steinberg.—This station was so thoroughly investigated by Colonel Schwab and his assistants that little remained to be done after the lowering of the water. The objects collected are both numerous and varied, and being among the earlier of the kind brought to light from the lake-dwellings, they have been fully illustrated by Dr. Keller. (B. 15 and 22.) Among them were some heavy stone weights, some perforated, and some with an iron hoop; discoidal stones, with a marginal groove; a variety of corn crushers, polishers, and hammer-stones, etc.
Bronze.—Sickles and axes, both socketed and winged, generally with a side loop, but without a notch at the top. Knives were numerous, and some were ornamented with flowing lines and semicircles; they were hafted by tangs or sockets, but in a few instances the blade and handle were cast in one piece. Several spear-heads, one of which is richly ornamented with a series of rings and a serpentine pattern; a few arrow-points with barbs; several socketed chisels of various sizes; numerous needles, hair-pins, fish-hooks, curiously-shaped pendants, rings, and bifurcated pincer-like objects; one hexagonal-shaped hammer with a socket, and another having a small loop attached to the side like that of a celt. Some remarkably fine bracelets, open at the ends, and hollow, and having the outside ornamented with concentric circles, lines, etc.; others are solid, or made of spirally-grooved wire. A number of so-called razors, buttons, studs, broad-headed nails, spirals, the central portion of a horse-bit, etc.
Gold.—A small spiral of gold wire, and a square piece of thin plate neatly corrugated.
Iron.—A few conical javelins with sockets.