Sheerin 501
Sheerin 501 is a psychologist from Saro University, a specialist in Darkness-induced mental disorders, and a man whose own encounter with total Darkness in the Tunnel of Mystery at the Jonglor Centennial Exposition gives him a visceral, personal understanding of the terror that will soon engulf his entire world. He is a large, ruddy, cheerful man by nature, but his experiences in the Tunnel and the subsequent catastrophe transform him, revealing a core of scientific courage beneath a layer of self-doubt and physical timidity. His professional expertise and his personal ordeal make him a crucial voice in the desperate attempt to warn civilization of the coming Nightfall, and his ultimate fate is a grim testament to the chaos that follows.
Identity and Professional Background
Sheerin 501 is a professor in the Department of Psychology at Saro University, whose doctoral thesis focused on Darkness-related mental disorders. He is described as a basically cheerful person, ruddy and very far from gaunt, with a lifelong partiality for people who are, like himself, "oversized." He is innately suspicious of anyone of adult years who weighs less than half of what he does. Despite his academic credentials, he has not done much clinical work in recent years, and he is surprised to find how tenderhearted and thin-skinned he has become when confronted with the suffering of the Tunnel of Mystery's victims. He is also a man of considerable professional pride, which pushes him to take the ride through the Tunnel himself despite his profound fear, refusing to let anyone accuse him of cowardice.
The Tunnel of Mystery and Its Aftermath
Summoned to Jonglor by the director of the Jonglor Municipal Psychiatric Institute, Kelaritan 99, Sheerin is tasked with investigating the psychological damage caused by the Tunnel of Mystery, a ride that plunges its passengers into fifteen minutes of total Darkness. He interviews victims like Harrim 682, a powerful longshoreman reduced to babbling hysteria by the memory of the ride, and others who have become completely catatonic or violently claustrophobic. Despite his own deep apprehension, Sheerin insists on experiencing the ride himself. He enters the Tunnel, and the experience is a nightmare. He feels sweat break out, his knees shake, and he is overwhelmed by a sense of tumbling into an infinite abyss. He hurls the abort switch into the darkness, refusing to use it out of pride. When he emerges, he is shaken to his core, and he delivers a blunt, passionate verdict to the Exposition's lawyer, Cubello 54: "The Tunnel's deadly. ... Shut the Tunnel down for good, Cubello! In the name of sanity, man, shut the thing down!" The experience leaves him with lingering aftereffects, including claustrophobia and nightmares of Darkness, which he struggles to conceal.
Role in the Eclipse Prediction and the Secret Meeting
Back in Saro City, Sheerin becomes a key member of the small group of scientists—including astronomer Athor 77, his young colleague Beenay 25, and archaeologist Siferra 89—who piece together the evidence for the coming cataclysm. In a secret meeting in Athor's office, Sheerin is asked for his professional opinion on the psychological effect of a prolonged, planet-wide Darkness. He states unequivocally that the effect will be "madness," predicting that at least seventy-five percent of the population will be made irrational to a disabling degree. He performs a simple but powerful experiment, asking Beenay to draw the curtains in the room, and watches the young astronomer's immediate distress, using it to illustrate humanity's innate, claustrophobic fear of the absence of light. He connects this to the archaeological evidence from the Hill of Thombo, where Siferra has found layers of cities destroyed by fire at regular intervals, arguing that the Darkness will drive people to light fires, which will then rage out of control. He is the one who articulates the terrifying chain of causation: "The eclipse will bring Darkness. Darkness will bring madness. And madness will bring the Flames."
The Night of the Eclipse and the Mob
On the evening of the eclipse, Sheerin makes a last-minute decision to leave the safety of the Sanctuary and join the scientists at the Observatory. He explains that he was bored in the Sanctuary and that a psychologist is not worth a damn there. He wants to see the Stars that the Apostles of Flame have been spouting about. When the mob from Saro City, driven by the Apostles, storms the Observatory, Sheerin initially tries to help Theremon barricade the doors. However, the full impact of the Darkness and the sight of the Stars overwhelms him. He feels his mind's grip giving way, but the immediate threat of the mob jolts him into survival mode. He flees to the basement and locks himself in a storeroom, spending the entire night of the eclipse hidden away, a decision he later reflects on with a mixture of shame and self-preservation. "Sometimes cowardice has its advantages," he tells himself.
Death and Legacy
After the eclipse, Sheerin emerges from the basement to find the Observatory wrecked and the world in chaos. He meets the young graduate student Yimot 70, and they travel together for a few days, but Yimot is killed by a little girl with a knife. Sheerin eventually parts ways with Theremon in the forest, heading south toward the provisional government at Amgando. He is later found dead in a ruined house, killed by a band of anti-intellectual crazies who blamed the university for the catastrophe. Folimun 66, the leader of the Apostles of Flame, informs Theremon of Sheerin's death, noting that his body was found by the Apostles' people. Sheerin's death is a direct consequence of the very madness he had predicted, a final, grim confirmation of his professional analysis. He is a victim of the world he tried to save, a man whose courage was real but whose psychological armor was not quite thick enough to withstand the reality of his own prophecies.
