And now the engineers proceeded to the unusual step of slinging fifty-pound stones at an individual.

This catapult was a scientific, simple, and beautiful engine, and very effective in vertical fire at the short ranges of the period.

Imagine a fir tree cut down, and set to turn round a horizontal axis on lofty uprights, but not in equilibrium; three fourths of the tree being on the hither side. At the shorter and thicker end of the tree was fastened a weight of half a ton. This butt end just before the discharge pointed towards the enemy. By means of a powerful winch the long tapering portion of the tree was forced down to the very ground, and fastened by a bolt; and the stone placed in a sling attached to the tree's nose. But this process of course raised the butt end with its huge weight high in the air, and kept it there struggling in vain to come down. The bolt was now drawn; then the short end swung furiously down, the long end went as furiously up, and at its highest elevation flung the huge stone out of the sling with a tremendous jerk. In this case the huge mass so flung missed the knight, but came down near him on the penthouse, and went through it like paper, making an awful gap in roof and floor.

A Catapult.

"Aha! a good shot!" cried Baldwyn of Burgundy.

The tall knight retired. The besiegers hooted him. He reappeared on the platform of the barbican, his helmet being just visible above the parapet. He seemed very busy, and soon an enormous Turkish catapult made its appearance on the platform, and, aided by the elevation at which it was planted, flung a twenty-pound stone two hundred and forty yards in the air. The next stone struck a horse that was bringing up a sheaf of arrows in a cart, bowled the horse over dead like a rabbit, and split the cart. It was then turned at the besiegers' wooden tower, supposed to be out of shot. Sir Turk slung stones cut with sharp edges on purpose, and struck it repeatedly, and broke it in several places. The besiegers turned two of their slinging engines on this monster, and kept constantly slinging smaller stones on to the platform of the barbican, and killed two of the engineers. But the Turk disdained to retort. He flung a forty-pound stone on to the besiegers' great catapult, and hitting it in the neighborhood of the axis, knocked the whole structure to pieces, and sent the engineers skipping and yelling.

The next morning an unwelcome sight greeted the besieged. The cat was covered with mattresses and raw hides, and fast filling up the moat. The knight stoned it, but in vain; flung burning tar barrels on it, but in vain. Then with his own hands he let down by a rope a bag of burning sulphur and pitch, and stunk them out. But Baldwyn, armed like a lobster, ran, and bounding on the roof, cut the string, and the work went on. Then the knight sent fresh engineers into the mine, and undermined the place and underpinned it with beams, and covered the beams thickly with grease and tar.

At break of day the moat was filled, and the wooden tower began to move on its wheels towards a part of the curtain on which two catapults were already playing, to breach the hoards and clear the way. There was something awful and magical in its approach without visible agency, for it was driven by internal rollers worked by leverage.