Kertelen's memory-erasure attack

Kertelen's memory-erasure attack is the decisive transformation that turns the Condor expedition's surviving member into an apparently living body without an accessible self. Found after an expedition into the ravines of Regis III, Kertelen is brought back to the Invincible restrained on a stretcher, whimpering and unable to communicate. Medical examination establishes that the damage is not ordinary unconsciousness or simple amnesia: his memories, speech, reading, writing, and personality have been annihilated, leaving only primitive bodily functions. The event gives the crew their clearest evidence that the force behind the Condor's tragedy can destroy a person without visibly killing the body, but it does not reveal whether the attack was deliberate, mechanical, or part of an impersonal process.

Discovery in the Ravines

Kertelen's condition follows an expedition led by Gallagher's team into a labyrinth of small, winding ravines. The group numbers eleven men and has been sent to investigate significant iron readings detected by ferrometers; Kertelen suspects that machinery may be hidden in the area. The terrain is difficult, consisting of soft organic cliffs hollowed out by water, caves, potholes, and numerous short side gullies. The men leave their caterpillars behind and remain close together, while Kertelen searches actively around the ravines.

Near the entrance of one cave, beneath mud and among stalactites and stalagmites, Kertelen discovers what resembles an automaton. The object is not an intact machine but the remains of a corpse-like mechanism: it has been consumed by corrosion despite being made from a rustproof alloy. Gaarb cannot determine how it once moved, only that it did not walk on two feet and did not move in a crablike fashion. The discovery is therefore both concrete and obscure, offering evidence of an earlier mechanical presence while withholding any explanation of its function or origin.

The Return to the Invincible

The attack is first perceived not through an explanation but through a spectacle of confusion. At dusk, the team returns toward the Invincible, and searchlights cut through the desert and the force-field entrance. Vehicles crowd the approach, people run across the sand, and automatons sweep the area with flashlights. A stretcher passes through this glare carrying a man whose arms and legs are tied down. His body strains against the ropes until they creak, and he emits an inhuman yelping sound. Rohan initially assumes that a work accident has occurred, but the restraint and the man's behavior immediately contradict that interpretation.

Rohan learns from Gaarb that the man is Kertelen. Gaarb has seen him almost until the end and recounts the moment when the expedition discovered that he was missing. Because everyone wore identical masks and mud-covered suits, it was difficult to distinguish one man from another. Gaarb had been protected by a force field and was responsible for counting the group. When one man was absent, the others began searching. Kertelen then appeared from behind a bend, already in the altered condition. Nygren initially considered heat stroke, but the symptoms quickly prove to be far more radical.

Annihilation Rather Than Amnesia

Sax's examination gives the incident its medical definition. Kertelen is not truly unconscious. He can walk and move, but communication with him is impossible, and he has lost the ability to speak. His hearing and sight remain within normal limits, making the damage more disturbing: the sensory channels are intact, while the structures that make experience personal and intelligible have disappeared.

Sax describes the state as amnesia of an unusually complete kind. Kertelen has lost not merely particular memories but knowledge of who he is, along with speech, reading, and writing. He can walk and eat, although food must be placed in his mouth, and he can grasp objects without demonstrating the integrated capacities that once made those actions meaningful. Sax therefore calls it an utter collapse, an annihilation of personality. The essential distinction is neurological: the traces of memory appear to have been erased in one operation, as though the central nervous system had been cleared rather than gradually damaged.

This diagnosis connects Kertelen directly with the man recovered from the Condor. The crew had used a grave-sounder on the frozen body because the low temperature had delayed decomposition. The apparatus sends electrical impulses into the brain, following pathways of least resistance along nerve fibers that had formed a functional whole immediately before death. Its results are uncertain, but in a crisis such as the investigation of the Condor, even a doubtful residue of consciousness may be vital. The frozen man's recorded engrams include an image of people who seem to be moving, but Sax explains that this movement is an illusion: engrams are recorded like photographs, and an apparent scene may be a composite of several images. The grave-sounder's testimony is thus both precious and unstable, while Kertelen's living body supplies a parallel form of evidence whose meaning is equally difficult to verify.

Evidence Without a Perpetrator

Kertelen's transformation changes the nature of the mystery. The crew no longer faces only missing men, wreckage, or unexplained deaths; it faces a process capable of preserving bodily function while removing the person who inhabited the body. Yet the incident supplies no conscious aggressor. The marks observed in the recorded images remain unexplained, and Sax admits that anything is possible while refusing to affirm a definite cause.

The uncertainty becomes especially significant in relation to Rohan's later recollection of killing a man who had become mindless and was about to kill others. Rohan remembers the Weyr gun, the smoking hole in the man's chest, Jarg's mutilated body, and the helpless survivors he gathered and tied together. The memory returns at night with sensory force, but it cannot resolve what happened on Regis III. Kertelen's condition makes mindlessness a recurring image in the expedition's experience: it is at once a medical fact, a threat to human identity, and a sign that the disaster may not fit the ordinary categories of assault or death.

Consequences and Significance

The immediate consequence of the attack is Kertelen's removal from ordinary human exchange. He can still perform isolated physical actions, but he cannot identify himself, speak, read, write, or answer questions. His body remains available to observation, while his testimony has vanished. This makes him a witness who cannot witness: he has passed through the crucial scene, but the attack has destroyed the symbolic tools by which he could report it.

For the investigation, Kertelen's condition confirms that the Condor's fate is part of a wider danger on Regis III. The same kind of annihilation is identified in the man from the Condor, linking the expedition's discoveries to the earlier catastrophe. For the narrative, the incident also establishes a severe contrast between technological sophistication and epistemic helplessness. The crew possesses force fields, neurological instruments, X-rays, and the grave-sounder, yet none can restore the erased personality or reliably reconstruct the event that erased it. What remains is a body, a handful of unstable images, and the frightening possibility that the disaster resulted not from hostile intention but from an inanimate process of self-organization.