On the 17th of December, Lyon Herald approached the walls and sounded a parley. That no undue haste on their part should reveal how anxious they themselves were for a cessation of hostilities, the leaders did not condescend to notice him, and he was obliged to return to the Governor and the Council with the report that he could not obtain speech of them. Later on in the day a second attempt was more successful; and consent was obtained to an interview between the rebel leaders and two envoys from the camp—the Justice-Clerk and the Provost of Aberdeen. The assumed indifference of those within the Castle caused the negotiations to drag on slowly through several days; and, at the very last moment, the demand that William Kirkcaldy should be handed over as a hostage, was on the point of making them fall through altogether. Finally, however, on the 22nd of December, a truce was agreed upon. The conditions were that the garrison should retain the Castle until the Regent obtained from the Pope absolution for all who had been concerned in the murder of Cardinal Beaton; that they, their friends, families, servants, and others pertaining to them, should never be pursued by law, but should enjoy all the privileges, spiritual and temporal, of which they had been in possession before the murder, ‘even as if it had never beene committed;’ and that, whilst James Hamilton was still kept as a hostage on the one side, David and James Kirkcaldy should be delivered to the Regent on the other, as pledges to insure the surrender of the Castle when the papal absolution arrived.

As soon as the royal army had been withdrawn, those who had held the Castle so valiantly came forth in great exultation. The lawless conduct of some of them was wholly unworthy of the brave men they had shown themselves to be. ‘They became so proud,’ says Pitscottie, ‘that no man might live besyd thame, for they would isch out and ryd throche the countrie quhen they pleased, and sumtymes raise fyre and burne, and vtherwhylles ravisch vomen, and vse thair bodie as they pleased. And some godlie men in the castell, that thought not thair lyffe nor conversatioun honest, reproved them sharplie, thairfoir, saying, if they left not aff, it could not be bot God would punisch thame for the same quhen they luiket least for it. Notwithstanding of thir admonitiounes, they continwed still in thair former doeingis the space of thrie quarteris of are yeir thaireftir.’

As might almost be inferred from the conditions of the armistice, neither besiegers nor besieged really looked upon it as a decisive step towards the termination of the struggle. The object on either side was merely to gain time and to make preparation for greater efforts. Scarcely was the truce signed when the rebel leaders wrote to their agent, Balneaves, instructing him ‘to solicit the King’s Majesty to write to the Emperor, to write to the Pope for the stopping and hindering’ of their absolution. He was further to impress on Henry the absolute need in which they stood of ‘support and aid of money.’ This money was to be sent by sea; and the greatest precautions were to be taken to avoid exciting suspicion. A ship was to come to St Andrews and to put out a boat, for the ostensible purpose of opening negotiations with the Castle, but, in reality, to hand over the money. After its departure the Governor was to be informed that its object had been to offer victuals, but that they had been refused. Nor was that all. The subsidy was not to be in English currency, of which a sudden influx would necessarily be noticed, but was to consist of the coins of France and other countries. This money, which would be accounted for as proceeding from the Cardinal’s coffers, was to be used partly for the revictualing of the Castle, and partly for distribution amongst friends, so that they might be ready, when his Majesty’s force came, to do such things as his Majesty might command them. In answer to this appeal Henry sent at least two remittances of money—one of £1180, and another of £1300. This was for pay to the garrison, which consisted of eighty foot and forty horse, and of which each man received eight pence a day. The Council Books show that further sums were transmitted for the leading men; that Norman Lesley’s share was £280; and that Sir James Kirkcaldy got £200 as his.

Whilst Balneaves was soliciting help from England, Panter, on behalf of the Regent, was appealing to France. On the strength of the old alliance between the two countries, Francis was requested to send supplies, not only of money, but also of arms, and to place some of his own experienced military leaders at the disposal of Scotland.

About the middle of June 1547, the papal bull upon which so much had been made to depend, reached Scotland, and was communicated to the rebel leaders, together with a summons that they should surrender the Castle, in accordance with the promise given by them the previous December. On making themselves acquainted with the document, they found it contained a remarkable clause, in which Paul III. professed to remit the crime that could not be remitted, ‘Remittimus irremissibile.’ It was, in all probability, nothing more than a theological conceit, in the Italian taste. But those whom it most nearly concerned read it otherwise. It was not, they declared, the sure and sufficient absolution which the Governor and his Council had undertaken to procure for them, but merely a trap set for their destruction. They consequently refused to give up the Castle, alleging that the condition upon which they had agreed to do so had not been fulfilled.

When the little garrison thus resolved once more to defy the Regent’s power, the armament upon which he depended to force them into subjection, was ready to set sail, if it had not already left the French port. On the 29th of June, a fleet consisting, according to some chroniclers of twenty-one galleys, according to others, of six galleys and two great ships, appeared in sight of St Andrews. Leo Strozzi, who was in command, at once disposed his vessels in such fashion that their artillery should command all the outworks of the Castle, and early next day sent another summons to the garrison to surrender. The bold defenders replied that he had no lawful authority over them, and that they consequently declined to obey his orders. That was the signal for the commencement of active operations on the part of the French squadron. Two days’ firing, however, produced no further effect on the fortress than the demolition of portions of the roof; whilst the defenders inflicted serious injuries on the assailants, and besides killing several rowers and soldiers, completely crippled one galley.

Strozzi, by this time, had recognized the futility of continuing the siege from the sea alone, and at once began to make preparation to attack it from the land side as well. The measures which he took showed that he meant more serious work, and that he understood his business better than the Scottish engineers who had conducted operations the summer before. Indeed, he did not hesitate to express his contempt for them as ‘unexpert men of war,’ to whom it had not occurred to mount batteries on the steeples and all the high places that overlooked the Castle. Nor did he think much better of the besieged for not bringing down the steeples to prevent such advantage being taken of them.

In getting his own batteries into position, Strozzi’s ingenuity was put to the test. His guns had to be taken through streets completely exposed to the fire of the enemy; and if men were employed to transport them, there would necessarily be very heavy losses amongst them. To avoid this, he set up powerful windlasses at the extremity of each street, and by their means was able to draw his cumbrous guns along without sacrificing the life of a single soldier. When this was noticed from the Castle by the Italian engineer, who had been sent from England to assist the garrison, he was not slow in realising the danger of the situation. ‘Defend yourselves, Masters,’ he exclaimed, ‘for now you have to deal with men of war who are very skilful and subtle, for they work their cannons without any men near them.’ But the confederates had dared too much to be intimidated by this new device, and they answered resolutely that they should hold the Castle to the last against the united forces of Scotland and France.

The laborious task of raising heavy guns on to the tower of the Abbey Church and the steeple of Saint Salvator’s College must have taken a considerable time, for the 24th of July is given as the date of the beginning of the siege from the land side. It had now become evident that the end could not be far off. From their high position the besiegers commanded even the courtyard of the Castle; and it was only with the greatest danger that the besieged could make their way from one point to another. The persistent cannonade drove them first from the block-house, then from the sea-tower, and finally effected a breach in the wall, of which a large portion came crushing down, with a mighty noise. A tremendous storm that broke out checked the progress of the assailants for a few hours, and probably saved the garrison from the slaughter which must inevitably have taken place if the breach had been stormed and the Castle captured by force. Even at this last extremity, there were some within the walls who counselled a last effort, and urged that the whole available force should join in a sortie. But the desperate proposal though discussed was not adopted; and when the storm abated and preparation was again being made for a final assault, a flag of truce announced that, for the first time, the rebel leaders demanded a parley with a view to the surrender of the fortress. But, not even yet was their spirit so utterly crushed that they were ready to consent without demur to any terms. Neither with the Governor nor with any of their own countrymen would they condescend to negotiate, for these had deserted them, ‘Which, I am assured,’ said the Laird of Grange, ‘God shall revenge ere it be long.’ It was to Strozzi himself that they surrendered. According to Knox the terms of the capitulation were: That the lives of all that were within the Castle, as well of the English as of the Scots, should be saved; that they should be safely transported to France; that, at the King of France’s expense they should be safely conveyed to any country they might desire, other than Scotland, in case that, upon conditions which should be offered by the King of France unto them, they could not be content to remain in service and freedom there.

Thus, on the 30th of July, 1547, ended the siege of the famous Castle. Entering it at once, the French ‘spoylled verrie rigorouslie.’ According to Pitscottie, ‘they gott both gold, silver, cloathing, bedding, meitt and drink, with all veapones, artaillie, and victuallis, and all vther plenisching, and left nothing behind thame that they might gett carried away in thair gallies.’ The ‘Diurnal of Occurrents’ estimates the value of the spoil at one hundred thousand pounds. By command of the Governor and Council, the Castle itself was razed to the ground. ‘Whether this was to fulfil their law, which commandeth places where cardinals are slain so to be used, or for fear that England should have taken it, as they did Broughty rock, we are uncertain,’ says Calderwood, who reports the fact.