The plot to overthrow Aegon III

The plot to overthrow Aegon III came to light during a secret siege of Maegor’s Holdfast, when a confession by Lord Thaddeus Rowan appeared to implicate the king’s own brother and queen in a conspiracy to replace him with Prince Viserys. Aegon rejected the confession as false and defended Rowan, turning the accusation back on those who had extracted it. The unravelling exposed a network of suspected conspirators but did not establish who, if anyone, had directed them from the shadows.

Political Background

The crisis unfolded amid a struggle over influence at court during Aegon III’s minority. Thaddeus Rowan had served as Hand, while Alyn Velaryon, known as Oakenfist, was associated with efforts to remove Unwin Peake from that office. The later charges against Rowan placed him at the intersection of these rivalries: he was accused of working with Oakenfist against Peake and of using his authority to advance his own family and allies.

The immediate setting was a siege within the Red Keep. Ser Marston Waters, Lord Commander of the Kingsguard and the most powerful man in the realm until Aegon came of age, hesitated to order an assault on the holdfast, where the king was confined. His vows to protect Aegon weighed against the demands of force; he continued to rely on negotiation, with hunger also expected to press the besieged. The stand-off made a public confession politically useful: it could discredit Rowan and justify action against those suspected of supporting him.

The Accusations and Confession

On the morning of the twelfth day of the secret siege, Rowan was brought forward in chains. Septon Bernard recited the charges against him. These included taking bribes, arranging for Moredo Rogare to challenge Ser Arnold Arryn’s inheritance in the Vale, conspiring with Oakenfist to displace Peake, and helping loot the Rogare Bank of Lys. Rowan was also accused of giving his son a command for which he was unfit, with the resulting losses in the Mountains of the Moon attributed to that appointment. These were allegations presented at the hearing, not independently established findings.

The gravest charge was that Rowan had joined the Rogares in a plan to poison Aegon and his queen, Daenaera Velaryon, and then put Viserys on the throne with Larra Rogare as queen. Bernard named the poison as Tears of Lys, and Grand Maester Munkun confirmed that identification. Bernard further connected the alleged plot to the death of Gaemon Palehair, Aegon’s young friend.

After Bernard finished, Waters announced that Rowan had confessed to the crimes. Rowan then affirmed the confession, saying that Lotho Rogare had promised him two payments of fifty thousand dragons and that Roggerio Rogare had supplied the poison. The account describes his speech as halting and slurred, and notes that his condition raised doubts among witnesses. The confession therefore seemed to provide a direct link between Rowan, the Rogares, and the poisoning, but the circumstances in which it had been obtained soon became decisive.

Aegon Rejects the Confession

Viserys challenged the accusation by asking whether Larra had been part of the plot and whether he himself had been involved. Rowan answered that both had been. Viserys then pointed out the absurdity of the proceedings by suggesting that Gaemon had also supposedly put the poison in the tart, before insisting that Gaemon had been guilty of nothing. Asked by Mushroom whether Rowan had poisoned Viserys, Rowan again said that he had.

Aegon responded by declaring Rowan innocent of treason and condemning the confession as false, extracted by the people who had tortured him. He ordered Waters to seize Lord Confessor George Graceford, warning the Kingsguard that failing to obey would mark them as traitors too. In that moment, the king who had been described as broken asserted his authority: rather than accepting the confession that appeared to secure the besiegers’ position, he used his command to protect his Hand and challenge the process that had produced it.

Waters obeyed. Graceford was arrested, Rowan’s chains were removed, and Rowan’s knights and servants were brought up from the dungeons. Graceford gave up names without needing to be subjected to further torment. Among those implicated were the late Ser Amaury Peake, Ser Mervyn Flowers of the Kingsguard, Tessario the Tiger, Bernard, Ser Gareth Long, Ser Victor Risley, Ser Lucas Leygood of the gold cloaks, six of the seven gate captains, and three of the queen’s ladies. Their named roles and the accusations against them broadened the inquiry, but did not by themselves establish which of them had knowingly taken part in a genuine plot.

Aftermath and Unresolved Leadership

The arrests met resistance. At the Gate of the Gods, a brief battle left nine dead, including Leygood. Three accused captains escaped with some of their men, while Tessario was captured at a dockside tavern as he tried to arrange passage aboard an Ibbenese whaler. Flowers confronted Waters and was killed during the ensuing struggle. Waters himself was also named by Graceford as a conspirator, although the account leaves open whether he had been involved from the beginning or had changed sides as the balance of power shifted.

The inquiry did not settle the question of who had organized the alleged conspiracy. Mushroom argued that an unnamed lord had set the others in motion and used them as catspaws, and pointed suspicion toward Unwin Peake. Several accused people had ties to Peake or owed their positions to him, and he had previously plotted against dragonriders. Yet Peake had been at Starpike during the siege, none of the supposed conspirators named him, and his role remained unproven. The distinction between a visible network of suspects and an unconfirmed hidden organizer is central to the episode: the inquiry exposed many connections, but its most consequential suspected connection could not be demonstrated.

Mistrust kept Aegon inside Maegor’s Holdfast for six more days after Viserys exposed the false confession. The king allowed the bridge to be lowered only after Grand Maester Munkun sent ravens summoning loyal lords to King’s Landing. By then, Graceford had named further suspects, several had been seized, others had fled, and Waters, Flowers, and Leygood were dead. Rowan returned to the Tower of the Hand, but the treatment he had endured in the dungeons left him unable to resume his duties. The plot’s exposure thus removed or discredited several figures, while leaving the court with a damaged Hand, a shaken king, and no conclusive answer about who had truly set the conspiracy in motion.