This is not a historical lesson with dates and events, but a mechanical lesson to explain the physical differences between these two magnificent ancient artillery weapons. Springalds and ballistae are both “catapults” that loose either spear-like bolts, Greek fire or round stones. The major difference between them is in how
FLAP, FLAP WENT the webbed feet of a mother duck up a muddy, arrow-riddled bogside. The planets and stars of the midnight sky rendered the mud a dark, dark blue, but the bog itself was a pit of silky blackness sucking the starlight away.
Quacking desperately, the mother duck pronked back down the slope in fright as a score of screaming horsemen completed a circuit around the bog. Lost in the black water, a train of yellow ducklings answered her with frantic chirps, kicking through the thickness toward her voice. Looming high above them all was a crooked siege tower filled with anguished men. Like a shipwreck on Hell’s shore, the tower was groaning and creaking, taking volley after volley of arrows and bolts from distant castle walls.