Still, as we shall see in a later chapter, the cross-bow was a most formidable weapon afloat, and the French herald's argument was a sound one. In the place of artillery the ships of the earlier Middle Ages were provided with mangonels, trebuchets, espringalds and other mechanical instruments for hurling heavy projectiles, which, according to some authorities, were made or imported as the result of the experiences of Richard I and his crusading companions in the Mediterranean. Personally, I should say that they had been known long before that time. A contemporary chronicle of the siege of Paris by the Northmen in 885-7 mentions that, to cover the Danish stormers, "thousands of leaden balls, scattered like a thick hail in the air, fall upon the city, and powerful _catapults_ thunder upon the forts which defend the bridge". The knowledge of the heavy war-machines of the Ancients had never died out. The catapult was the old Roman onager, and consisted of a long arm or beam, of which one end was thrust through the middle of a tightly-twisted bundle of hair-ropes, fibres, or sinews stretched across a solid frame. At the other end was either a sling or a spoon-shaped receptacle for the projectile. This end was drawn back by means of levers and winches against the twist of the bundle of sinews and held by a catch. On the catch being released, by pulling on a lanyard attached to a trigger, the long end of the beam was forced violently forward till it struck against a strongly-supported transverse baulk of timber arranged for the purpose. When this occurred the huge stone or other projectile flew on through the air and struck its target with tremendous force. The trebuchet and the mangonel were very like the Roman ballista, and acted much in the same way as the catapult, except that the motive force was the fall of a heavy counterweight instead of tension. The springald, or espringald, was a large-sized steel cross-bow, mounted on a pivot, hurling heavy iron darts, with great force, which had considerable penetration. In the battle of Zierksee (1304) one of these heavy "garots", as they were called, struck the _Orgueileuse_ of Bruges with such violence that it not only pierced the bulwarks of the forecastle, but took off the arm of one of the trumpeters who were sounding their silver trumpets, transfixed another, and finally embedded itself in the after castle.