M. de Reffye, the archæologist, accounts for this fact in the following way:--He is of opinion that the body of the blade is made of very hard unyielding iron, whilst the edges are made of small strips of mellower iron which have been subsequently welded and wrought by the hammer. This mode of manufacture enabled the soldier, when his sword was notched, to repair it by means of hammering. This was a most valuable resource during an epoch in which armies did not convey stores along with them, and when the soldier's baggage was reduced to very little more than he could personally carry. Several of these damascened blades have been found in the trenches of Alise. The sheaths, the existence of which now for the first time comes under our notice, are of great importance on account of the designs with which they are ornamented. Most of these designs are engraved with a tool, others are executed in _repoussé_ work. All of them show great originality and peculiar characteristics, which prevent them from being confounded with works of Roman art. One of these sheaths (fig. 249), which belongs to M. Desor's collection and is depicted in his memoir, represents the "horned horse," the emblem of Gaul, which is sufficient proof of the Gallic origin of the weapons found in the Lake of La Tène. Below this emblem, there is a kind of granulated surface which bears some resemblance to shagreen. [Illustration: Fig 249.--Sheath of a Sword, found in one of the Swiss Lakes.] This sheath is composed of two very thin plates of wrought iron laid one upon the other, except at the base, where they are united by means of a cleverly-wrought band of iron. At its upper extremity there is a plate, on one side of which may be seen the designs which we have already described, and on the other a ring, intended to suspend the weapon to the belt. The lance-heads are very remarkable on account of their extraordinary shape and large size. They measure as much as 16 inches long, by 2 to 4 inches wide, and are double-edged and twisted into very diversified shapes. Some are winged, and others are irregularly indented. Some have perforations in the shape of a half-moon (fig. 250). The halberd of the middle ages was, very probably, nothing but an improvement on, or a deviation from, these singular blades. [Illustration: Fig. 250.--Lance-head, found in one of the Swiss Lakes.] Fragments of wooden staves have been met with which had been fitted into these spear-heads; they are slender, and shod with iron at one end. The care with which these instruments are wrought proves that they are lance-heads, and not mere darts or javelins intended to be thrown to a distance and consequently lost. They certainly would not have taken so much pains with the manufacture of a weapon which would be used only once.