The memory-erasure attack on Myfanwy Thomas was both a calculated attempt to silence a threat and the turning point that defeated its own purpose. Conrad Grantchester and his associates tried to erase her identity after discovering that she had uncovered their secret Camp Caius operation. The procedure removed her memories, but Myfanwy responded with an unexpected psychic assault and escaped; the resulting deaths, disappearances, and bank attack made clear that Grantchester’s supposed blank slate remained capable of action.

Causes and the Camp Caius discovery

Grantchester later explained that he acted after learning that Myfanwy had entered Camp Caius weeks earlier. A guard there had suffered a seizure, prompting the facility to investigate whether one of its subjects had affected someone nearby. Blood tests and CAT scans eventually revealed that Myfanwy had controlled the guard. Staff recognized the evidence as characteristic of her powers, drawing on test results from her years at the Estate that had been shared unofficially with Camp Caius.

The discovery changed Grantchester’s assessment of the danger. He had assumed Myfanwy’s Checquy duties left her no time for outside research, and her silence had helped keep the secret operation safe. Once he feared the program had been found out, he decided that her knowledge could not be allowed to reach the rest of the organization. He later claimed that a disappearance would have prompted a thorough investigation, but that a Bishop’s offer to lead it would have been welcomed and any surviving evidence could have been concealed. In his account, speed mattered because discovery had made delay dangerous.

The seizure attempt at the Rookery

Grantchester mobilized a team that included graduates of Camp Caius kept at the Apex in a discreet bodyguard role. He said the Rookery had concealed entrances known to him, including one leading to the private quarters of the Rooks. He waited there for Myfanwy to arrive at her residence, accompanied by Norman and other aides, and then closed the room behind her.

Grantchester remembered Myfanwy as unexpectedly composed. Rather than showing the fear he anticipated, she stood facing him in silence. When he began to speak, she told him to stop and called him a traitor. Grantchester then struck her and ordered his Retainers to restrain her while Norman prepared to act. Myfanwy fought back: she disrupted the men holding her and touched Mark’s cheek, causing his pupils to close and temporarily blinding him. The attack did not prevent Norman from beginning the erasure, but it demonstrated that she could still use her ability under pressure.

Norman’s procedure and Myfanwy’s response

Norman’s role in Grantchester’s operation extended beyond this attack. Grantchester described him as an operative used to remove incriminating memories when witnesses could not simply be killed. In Myfanwy’s case, the objective was more complete: Norman cancelled her powers and erased the personality that Grantchester believed made her dangerous. The group expected that removing her memories would also prevent her from striking back.

After Norman finished, Myfanwy lay unconscious on a sofa while Grantchester’s party attended to the Retainers and prepared to transport her to a laboratory. Then she sat up and screamed. Grantchester said that people subjected to Norman’s manipulation were normally unable to respond immediately; after a complete erasure, the mind was occupied by the effects of its deletion, and the personality took about an hour to dissolve before a more pliable person emerged. Myfanwy’s response broke that expectation.

Her scream accompanied a psychic assault that Grantchester described as striking the group like a hammer. He and Norman needed several minutes to recover. By the time they did, Myfanwy had disappeared into the Rookery’s corridors. The attempt had removed her memories, but it had not produced the compliant, incapacitated subject the conspirators expected.

Escape, casualties, and the failed cover-up

Grantchester feared that Myfanwy might encounter members of the Checquy and communicate what she had learned before the erasure took effect. He sent loyal Retainers through the Rookery passages to find her. None of those dispatched returned. Several were later found dead in a park in Pinner, and Grantchester sent a cleanup crew. He also said that other operatives failed to report back and that he assumed Myfanwy had eliminated them.

The pursuit continued beyond the Rookery. Grantchester’s team tracked Myfanwy to a hotel after she used her bank card at an ATM to check her balance. They then listened to her driver’s radio to reach the bank ahead of her. The encounter there left the infiltration team comatose and in need of extensive physiological and psychological therapy. Grantchester described them as his most capable team. The attack’s consequences therefore extended past the immediate escape: the people charged with recovering Myfanwy became further casualties of the plan.

The group also lost track of her after the bank. Grantchester said that surveillance cameras around London had allowed him to reconstruct her route there, but that his attention shifted to the incapacitated operatives. The scattered casualties contradicted Norman’s confidence that he had left Myfanwy with no capacity to act. Grantchester admitted that the bodies around London disproved his expectation that she would be completely incapacitated, even as he insisted that the erasure had removed the thoughts and memories that made her Myfanwy Thomas.

Significance of the failed erasure

The attack exposes a gap between the conspirators’ categories and the person they attempted to control. Grantchester treats memory, personality, learned skills, and power as separable components: he believes Norman has destroyed Myfanwy’s identity while leaving her education and skills intact. Yet the event’s immediate outcome resists that tidy distinction. The supposedly blank subject acts, escapes, and inflicts consequences that Grantchester cannot contain.

It also establishes the attack as the cause of the circumstances Grantchester later recounts. His explanation links the Camp Caius discovery to the seizure attempt, the erasure to Myfanwy’s flight, and the attempted recovery to deaths and the bank incident. He frames the operation as an emergency response to exposure, but the chain of consequences reveals the cost of trying to protect a secret by forcibly removing the person who found it. The attack succeeds in erasing memory; it fails to make Myfanwy harmless or to keep the conspiracy secure.