"Treason! treason! to arms!" An instant stir was heard in the castle. Rapidly the thirty men followed each other up the ladder, and so soon as the last had gained the battlements they divided in three bodies, each headed by one of the leaders. One party descended straight into the castle and there attacked the soldiers who were hurrying to arms, while the others ran along the wall in opposite directions, cutting down the sentries and brushing aside all opposition until together they met at the gate. This was thrown open, and the Scots outside running up at the top of their speed poured into the castle. At first Randolph's party, which had descended into the courtyard, had been hotly pressed, and had with difficulty defended themselves; but the attention of the startled garrison was distracted by the shouts upon the walls, which told that other parties of their assailants had gained footing there. All sorts of contradictory orders were issued. One commanded them to cut down the little party opposed to them, another ordered them to hurry to the walls, a third to seize the gate and see that it was not opened. The confusion reached its height as the Scots poured in through the open gate. The garrison, surprised and confounded as they were at this, to them, almost magical seizure of the castle by their foes, fought bravely until the governor and many of the officers were killed. Some of the men threw down their arms, and others, taking advantage of their knowledge of the castle, made their way to the gate and escaped into the open country.

The news of the capture was immediately sent to the king, by whose orders the castle and walls were razed to the ground, and thus another of the strongholds, by whose possession the English were enabled to domineer over the whole of the surrounding country, was destroyed.

While Douglas and Randolph were thus distinguishing themselves Edward Bruce captured the castle of Rutherglen, and afterwards the town of Dundee; and now, save Stirling Castle, scarcely a hold in all Scotland remained in English hands. Thus was Scotland almost cleared of the invader, not by the efforts of the people at large, but by a series of the most daring and hazardous adventures by the king himself and three or four of his knights, aided only by their personal retainers. For nine years they had continued their career unchecked, capturing castle by castle and town by town, defeating such small bodies of troops as took the field against them, England, under a supine and inactive king, giving itself up to private broils and quarrels, while Scotland was being torn piecemeal from her grasp.

After Edward Bruce had captured Dundee he laid siege to Stirling. As this castle had for many months resisted Edward I backed by the whole power of England, Bruce could make little impression upon it with the limited appliances at his disposal. From February till the 24th of June the investment continued, when the governor, Sir Philip Mowbray, becoming apprehensive that his provisions would not much longer hold out, induced Edward Bruce to agree to raise the siege on condition that if by the 24th of June next, 1314, the castle was not effectually relieved by an English force, it should then be surrendered.

No satisfactory explanation has ever been given of the reasons which induced Edward Bruce to agree to so one sided a bargain. He had already invested the place for four months, there was no possibility of an army being collected in England for its relief for many months to come, and long ere this could arrive the garrison would have been starved into surrender. By giving England a year to relieve the place he virtually challenged that country to put forth all its strength and held out an inducement to it to make that effort, which internal dissension had hitherto prevented. The only feasible explanation is that Edward Bruce was weary of being kept inactive so long a time before the walls of the fortress which he was unable to capture, and that he made the arrangement from sheer impatience and thoughtlessness and without consideration of the storm which he was bringing upon Scotland. Had it been otherwise he would surely have consulted the king before entering upon an agreement of such extreme importance.

Bruce, when he heard of this rash treaty, was highly displeased, but he nevertheless accepted the terms, and both parties began at once their preparations for the crowning struggle of the war. The English saw that now or never must they crush out the movement which, step by step, had wrested from them all the conquests which had been won with such vast effort under Edward I; while Bruce saw that a defeat would entail the loss of all that he had struggled for and won during so many years.

King Edward issued summonses to the whole of the barons of England and Wales to meet him at Berwick by the 11th of June with all their feudal following, while the sheriffs of the various counties and towns were called upon to supply 27,000 foot soldiers. The English of the settlements in Ireland were also summoned, besides O'Connor, Prince of Connaught, and twenty-five other native Irish chiefs, with their following, all of whom were to be under the command of Richard de Burgh, Earl of Ulster.

The Prince Bishop of Constance was requested to furnish a body of mounted crossbowmen. A royal fleet of twenty-three vessels was appointed to assemble for the purpose of operating on the east coast, while the seaports were commanded to fit out another fleet of thirty vessels. A third fleet was ordered to assemble in the west, which John of Lorne was appointed to command under the title of High Admiral of the Western Fleet of England. From Aquitaine and the French possessions the vassals were called upon to attend with their men-at-arms, and many knights from France, Gascony, and Germany took part in the enterprise.

Thus, at the appointed time over 100,000 men assembled at Berwick, of whom 40,000 were men-at-arms, and the rest archers and pikemen. For the great armament the most ample arrangements were made in the way of warlike stores, provisions, tents, and means of transport, together with the necessary workmen, artificers, and attendants.

This army surpassed both in numbers and equipments any that Edward I had ever led into Scotland, and is considered to have been the most numerous and best equipped that ever before or since has gathered on English ground. Of the whole of the great nobles of England only four were absent—the Earls of Warrenne, Lancaster, Arundel, and Warwick—who, however, sent their feudal arrays under the charge of relations.