Arthur Pendleton was not the kind of man who made discoveries. He was the kind of man who catalogued other people's discoveries — a junior astronomer at the Royal Observatory in Greenwich, tasked with the tedious work of classifying faint nebulae and tracking transient events that senior astronomers deemed unworthy of their attention. It was, he had quickly learned after three years at the Observatory, the astronomical equivalent of filing tax records: necessary, unglamorous, and almost never appreciated.

But Arthur was diligent, and diligence has its own kind of eyesight.

It began on a Thursday in October 1893, when Arthur was cross-referencing a series of observations from the Dublin Observatory against Greenwich records. He was looking for discrepancies — measurement errors, atmospheric distortions, anything that might explain why a nebula catalogued by the Dublin team appeared slightly brighter in Greenwich's records than in their own. A simple cross-check. The kind of task that occupied an afternoon and was then forgotten.

He did not forget this one.

Because among the discrepancies — and there were several, nothing unusual about that — he noticed something else. Something he initially dismissed as a cataloguing error. A star that appeared in three different observatories' records from the previous decade had not been detected in any survey conducted in the past five years. It had simply vanished.

Not dimmed. Not moved. Vanished.

Arthur shrugged. Stars were not supposed to vanish. But he filed the observation away — a minor anomaly, nothing more — and continued with his cataloguing.

It was only weeks later, when he encountered a second missing star, that he began to suspect the first had not been an isolated incident. This one was from the Cambridge records — a faint red dwarf in the Lyra constellation, observed regularly between 1880 and 1885, and then gone. No explosion. No transit. No explanation.

Arthur began to look.

He spent the next three months — late nights at the Observatory, weekends in the British Museum's astronomical archives — tracing the disappearance of stars across decades of records. He cross-referenced Greenwich, Cambridge, Dublin, Edinburgh, and Paris. He combed through the publications of the Royal Astronomical Society, the French Academy, the Berlin Observatory. He looked for patterns. He found them.

Seventeen stars. Seventeen different observatories. Seventeen different timeframes. All missing. All within the past fifty years.

And all forming a pattern.

Arthur pinned the data to a cork board in his small room above a pub near Greenwich Village. He drew lines connecting the stars' last known positions. He calculated their positions at the time of disappearance. He looked for trajectories, for velocities, for anything that might suggest a natural mechanism.

What he found was not natural.

The missing stars formed a corridor — a line through the galaxy, extending from the constellation Taurus toward the constellation Cygnus, moving at a velocity that no known astronomical phenomenon could explain. It was as though something had moved through the galaxy, systematically removing stars from existence, and was still moving.

He presented his findings to Dr. Edwin Blackwood, his superior at the Observatory, in a private meeting on a Friday afternoon in February 1894. Blackwood listened with the patient boredom of a senior man listening to a junior man make a mistake.

"Mr. Pendleton," he said when Arthur finished, "you are suggesting that seventeen stars have mysteriously vanished in a pattern that suggests systematic destruction by an unknown mechanism."

"I am suggesting," Arthur said carefully, "that the data shows a pattern that cannot be explained by known astronomical phenomena."

"Which is, of course, true. The data shows many things that cannot be explained by known phenomena. That is why we have mysteries to solve and theories to test. But I must advise you, Arthur, against drawing conclusions that would require — what exactly? Some unknown force? Some cosmic entity? These are the sort of conclusions that make careers end prematurely."

Arthur left the meeting with his notes in his briefcase and a growing sense of isolation that he had not anticipated. He was not angry at Blackwood's dismissal — he understood it, even agreed with it. The scientific method required skepticism, and his findings were, by any reasonable standard, extraordinary. Extraordinary claims required extraordinary evidence.

But Arthur was a diligent man, and he had time.

He returned to the British Museum, where Miss Catherine Hale — archivist, amateur astronomer, and the most patient person Arthur had ever met — helped him locate additional records. Between them, they worked through centuries of astronomical observation, and the pattern deepened. The corridor was not just expanding — it was accelerating. The rate of stellar disappearance was increasing, and the latest observations suggested that the corridor's leading edge was closer than anyone realized.

Not close enough to worry about. Not yet. But close enough that Arthur could not sleep.

On the night of the final observation, Arthur sat alone at the Greenwich telescope, watching a star in the Sirius cluster that had been catalogued and confirmed just hours before. He watched it until dawn.

By 4:00 AM, it was gone.

He wrote everything down — every observation, every calculation, every deduction — in a leather-bound journal that would, he knew, be dismissed as the product of an overwrought imagination. He did not care. The truth was the truth, whether anyone believed it or not.

The corridor was moving. Stars were disappearing. And the pattern pointed, inevitably, toward home.