THE SIEGE AND DEFENCE OF A MEDIEVAL CASTLE

A work upon castellation would undoubtedly be incomplete if it omitted to deal with the interesting subject of the means by which the medieval knight defended his castle, and of the methods he employed for attacking his neighbour's, or an enemy's town, whether in a private feud or legitimate warfare.

Through the almost universal habit of perusing medieval romances the general public has formed a mental picture of the hero and his followers riding round a castle and summoning it to surrender, or challenging the garrison to emerge from their retreat and essay mortal combat in the open. As the engineer and captain of the sappers and miners, the director of the artillery, the designer of movable towers, and the general head of the various artifices calculated to bring the besieged to their senses, the hero is less well known.

The coup de main method of attack has probably been the same in most ages, and undoubtedly was the chief means resorted to by primitive man. His missile weapons during the Stone, Bronze, and Early Iron Ages were of no use against earth ramparts crowned by thick palisading; sling, stones, arrows, and spears were only efficacious against the bodies of his enemies, and hand-to-hand combat was therefore a necessity. Hence we may imagine a concentration against a presumably weak point, a sudden rush, the plunge into the dry ditch and a rapid scramble up the scarp towards the palisades under a shower of arrows, stones, and other missiles; the mad escalade of the defences surmounting the earthwork and the fierce resistance of the defenders, followed by a successful entry or a disastrous repulse and retreat.

Precisely the same course was pursued in the medieval period when a rapid bridging of the moat by planks and beams would be attempted, scaling ladders would be reared, and, protected by their shields from the rain of missiles, the assailants, covered by their archers' fire of arrows and bolts upon the ramparts, would mount their ladders and attempt to effect a lodgment upon the walls. And, although weapons and conditions have changed, the assault to-day is made upon the self-same methods.

If, instead of the coup de main, a sustained siege is decided upon the knight will order his "gyns" to be brought up to the front, and large and heavy ones to be built upon the spot. From the time when Uzziah "made in Jerusalem engines, invented by cunning men, to be on the towers and upon the bulwarks, to shoot arrows and great stones withal," [1] down to the invention of cannon, the ingenuity of man has been exercised in devising machines for hurling missiles to a distance.

The Greeks, Romans, and other nations of antiquity brought them to perfection, and marvellous results were obtained in ancient sieges; the vivid account by Plutarch of the great engines used at the attack upon Syracuse, B.C. 214-212, reads almost like romance. Caesar frequently mentions this artillery, and especially the portable balistae for throwing arrows and casting stones; they were fitted with axles and wheels and manoeuvred like batteries of cannon at the present day. Larger engines were constructed as required like those of the medieval period.

The ancient engines were distinct from those of a later age in depending for their efficacy upon the forces of tension and torsion as compared with that of counterpoise in the middle ages. The art of preparing the sinews of animals so as to preserve their elastic powers was known to the ancients, and great bundles so treated were utilised in different ways in the various engines. Experiments on sinews, ropes of hair, and other materials at the present day have proved that loss of elasticity soon occurs, whereas we learn that such was not the fact in classical times with their special method of preparation. By fixing an endless skein in a suitable frame, stretching it tightly and then twisting the skein in the centre by means of a beam of wood, the necessary torsion was obtained; if a missile were placed upon the beam when drawn back and the beam released, the projectile would be hurled to a distance proportionate to the velocity of the arm and the weight of the missile.

The principle may readily be gleaned from the accompanying diagram which exemplifies the two vertical skeins used in a portable balista for throwing arrows; by being fixed in a suitable frame an action like that of the bow could be obtained. By using immense coils of twisted sinew the nations of antiquity, and especially the Greeks, threw stones weighing 50 lbs. or more to a distance of from 400 to 500 yards, and as a general rule with marvellous accuracy, while lighter missiles are stated to have been hurled to between 700 and 800 yards. These engines received the general name of "catapults," although the Greeks generally referred to them under the term "tormentum," in reference to the twisted sinews, thongs, and hair, of which the skeins were made. Broadly speaking, catapults shot darts, arrows, and the falarica,—a long iron-headed pole; balistas projected stones or similar missiles, though the names are often interchanged by the chroniclers. Some time after the fall of the Roman empire the secret of preparing the sinews was lost.

The Trebuchet.—Another force was called into play for medieval artillery. This was the counterpoise, or gravitation, and the principle upon which all large engines or "gyns" were constructed during the middle ages. A long wooden arm was pivoted in a framework so that a short and a long portion projected upon either side; to the shorter part a great weight in a swinging cradle was fixed which necessarily raised the longer arm to the vertical position. If the latter were drawn backwards and downwards the great weight was accordingly raised, and upon release the long arm would sweep upwards in a curve and project any missile attached to it. By fixing a sling of suitable length to the arm the efficiency was immensely increased (see Title-page). Such was the principle of the "trebuchet," the enormous engines which carried devastation and destruction to medieval castles. The French are said to have introduced these in the twelfth century, and by the end of the thirteenth they were the most formidable siege engines of the time.

The transition period in England between the classical weapons and the trebuchet was the twelfth century and the early part of the thirteenth. The veterans from the crusades undoubtedly introduced the torsion and tension engines, but found that the home-made article could not compete in efficiency with the Oriental examples and therefore the advent of the trebuchet was welcomed. Roughly speaking, the original balista or catapults depending upon torsion, and throwing shafts rather than balls, were not so frequently in use as those engines which depended upon tension and threw heavy stones. In the early part of the thirteenth century the balista catapult came into vogue once more; it was of the cross-bow type, and at the end of the century was called the espringale and mounted on wheels.

The counterpoises used in large trebuchets weighed sometimes between 8 and 9 tons; the throwing arm was often 50 feet in length, and the engine could hurl a projectile weighing between 2 cwt. and 3 cwt. to a distance of about 300 yards. Dead horses were at times sent whirling over the battlements into a besieged town, while casks of matter of an offensive character and likely to breed pestilences were common missiles. But the chief use and purpose of the trebuchet was the smashing-up of bretasches; the pounding of the battlements and upper works to facilitate escalades; the filling up of the moat in selected places by throwing large quantities of earth, stones, etc., into it and against the walls, and, occasionally, to hurl some unfortunate envoy back again into a town or fortress when the messages he carried were distasteful to the besiegers. In a medieval MS. full directions are given for trussing a man intended for use as a projectile.

Camden states that at the siege of Bedford Castle by King John one of the mangonels, i.e. trebuchets, threw millstones into the castle. He mentions seven great machines being at work at one time. Again, when Henry III. besieged Kenilworth, in 1266, stones of extraordinary size were used as missiles; some are still preserved at the Castle and two are at the Rotunda, Woolwich, the diameters being 18-1/2 inches and 16-1/4 inches; the weight 256 lbs. and 165 lbs. respectively. At Pevensey Castle catapult stone shot of 144, 156, and 241 lbs. respectively have been discovered. The great trebuchet constructed by Edward I. for the siege of Stirling Castle cast balls weighing between two and three hundredweight. The several parts of this great machine were sent by sea, but the Castle surrendered before its efficacy could be tried. The King was annoyed that this, his pet device, the "War-Wolf," as it was termed, had not had an opportunity, and therefore ordered the garrison to remain within while he took a few "pot-shots" at their defences.

Such projectiles would almost demolish a house, and were nearly as formidable as modern shells; their great weight would batter every portion of a medieval castle except the very thickest of walls. The platforms of earth thrown up by besiegers to sustain their great engines remain in many places intact to-day; thus round Berkhampstead Castle are eight, upon which the trebuchets of the Dauphin were erected in 1216, when he battered the castle into submission in about a fortnight. The terms mangonel, petrary, balista, onager, scorpion, perrier, catapult, etc., when used by historians of the middle ages, generally apply to the trebuchet and its varieties, large and small.

The Arblast, Espringale, and Spurgardon were engines based upon the cross-bow or tension principle; some were of considerable size and threw huge bolts tipped with iron. Another and a common use was to convey ignited incendiary matter into the enemy's quarters by their means. They were mounted upon towers, curtain walls, and in the baileys, while in the open when placed upon wheels they served the purpose of field-pieces.

The Ram, based upon the weapon used by the ancients, was in frequent use. The working parts and the men manipulating it were protected by a pent-house called the "Snail," or "Whelk," having a roof of considerable thickness. In this house it was suspended by chains and pulled backwards and forwards by hand or mechanical appliances; when released, it smashed the stones in the wall to powder, so that they could be subsequently removed from the defences. To mitigate the effects the besieged let down mattresses, bags of wool, and coiled rope mats by chains from the ramparts.

The Terebra.—A machine based upon the classical terebra was also in use. It consisted of a heavy beam which could be rotated; the iron head being furnished with a spike of square section was inserted in a joint into which it bored its way, breaking up the surrounding stones and facilitating their removal.

The Cat, or Sow, was in constant use for mining and underpinning walls. It was a covered house upon wheels, with an enormously strong roof calculated to withstand the heavy stones, beams of wood, hot water, molten lead, and spiked poles which were invariably launched from the battlements for its destruction. Under its cover the besiegers tunnelled beneath the walls, which they supported with woodwork until their task was completed; by starting a conflagration in the chamber thus excavated the supports were consumed and the wall was breached. At other times the stones, previously shattered or loosened by the ram or the terebra, were removed until the wall above was incapable of bearing its own weight. Mining, like other operations, had to be carried out with discretion and was undoubtedly a precarious operation. Thus in the siege of Dryslwyn Castle, Carmarthenshire, in the time of Edward I., Lord Stafford and other leaders lost their lives by a sudden collapse of the walls they were undermining. The mine was often met by a counter-mine of the garrison as in modern warfare.

The Beffroi, Belfry, or Movable Tower was a machine for facilitating the capture of fortified positions. It could be built upon the spot or carried from place to place in pieces. When mounted upon wheels it was pushed forward towards the walls, the object being to give the assailants the same advantage of height which was shared by the besieged. From the upper platform the archers could command the battlements and approaches; those in lower stages sent their missiles into loopholes and other openings; in the lowest stage a ram was often mounted. One feature of its construction was a hinged platform which fell outwards upon the battlements and over which the assailants endeavoured to enter the fortress. The besieged hindered the approach of this terror by digging pitfalls for the wheels, shooting incendiary missiles, making sallies for its destruction by fire, or concentrating such a body of men upon the walls that none could live under the hail of missiles poured into it.

The methods of assailing a castle thus enumerated were, as a rule, put into operation at the same time and supported one another. Thus in the siege of Bedford Castle, defended by the followers of Faukes de BreautÉ, in 1224, the siege was carried out by King Henry III. in person. Two wooden Beffrois were made and advanced towards the walls,—these were occupied by longbow-men and arbalestiers; sappers approached the walls and undermined by means of a Cat; seven trebuchets cast their ponderous projectiles against, or into, the castle without intermission night and day, while lesser artillery hurled lead-covered stones, darts, bolts, and other missiles among the defenders upon the walls, or through the oillets and louvre-covered windows. The barbican was taken and then the outer bailey; a breach in the defending wall gave admission to the inner bailey, and when, by judicious sapping, one portion of the great Shell Keep sank and produced a wide breach, the castle was surrendered.

In medieval manuscripts we meet with many illustrations of petardiers hurling vessels containing Greek fire upon the various engines attacking a castle or town, and perhaps this terrifying missile deserves more notice than has hitherto been paid to it. Introduced from the East during the time of the Crusades it was used with other incendiary bodies, but as no great objects were specially achieved by its use in our islands, or rather, as chroniclers do not make special mention of such results, we are probably justified in thinking that the effects were more of a terrifying character than of actual effectiveness in besieging or defending a castle.