Derby Escapes the Cellar and Warns Upton

Derby Escapes the Cellar and Warns Upton is the final attempt by Edward Derby to expose the supernatural body exchange that has overtaken him and to prevent it from continuing. Trapped in the decaying body of Asenath Waite beneath the cellar boxes, Derby claws his way out, reaches Daniel Upton’s home, and communicates by a hurried note when he can no longer speak effectively. His warning turns a familiar signal of friendship into the prelude to a revelation: the person Upton believes is Derby is, according to the note, Asenath occupying Derby’s body.

Causes and Background

Derby’s message explains that he had killed Asenath three and a half months earlier, after realizing that she was about to take his body permanently at Hallowmass. He says they were alone and he was in his own body when he killed her. He hid her remains in a storeroom at the far end of the cellar, beneath old boxes, and cleaned away the traces. The household servants suspected what had happened the following morning, but Derby believed their own secrets—and their connections to Asenath’s cult—would prevent them from informing the police. He sent them away, yet feared that they and others involved with the cult might still act.

For a time, Derby thought he had escaped the danger. Then he felt the familiar pull at his brain and understood it as Asenath’s continuing effort to exchange bodies with him. His note describes the principle he believes governs the threat: a soul like Asenath’s, or Ephraim Waite’s, remains partly detached and can persist after the body dies, so her death had not ended her ability to pursue him. The body exchange was not simply a struggle between the living; Derby feared that Asenath was forcing him into the corpse hidden in the cellar while taking possession of his living body.

Escape and Arrival

As the exchange began, Derby found himself confined in Asenath’s remains in the cellar. He says that he understood the danger too late: because the attempt came after Hallowmass, he believed the sacrifice could make the exchange permanent even without Asenath’s physical presence at the ritual. In his account, Asenath was already in his body at the sanitarium, sane and able to return to the world as a threat. Derby clawed his way out of the cellar and made his escape despite his weakened condition.

The next sign of his arrival was the doorbell and knocker at Upton’s house, sounded alternately and uncertainly just before two in the morning. The caller tried to reproduce Derby’s old signal of three strokes followed by two. Upton recognized the code and initially hoped that his friend had returned to his rightful self. He went downstairs believing that Derby might have been released or escaped from the institution and that he would need help. Instead, opening the door revealed a short, hunched figure. It wore one of Derby’s overcoats, with the sleeves rolled back but still covering its hands, and a low slouch hat and black silk muffler concealed its head and face.

The figure could not deliver its message by speech. It made a sound Upton recognized from an earlier telephone call, then pushed a closely written sheet toward him on the end of a long pencil. Upton identified the handwriting as Derby’s, though it appeared unusually coarse and shaky. The caller followed him into the hall but stopped at the inner threshold while Upton tried to read the page. These details make the encounter a broken version of their former friendship: Derby can still use their private signal and his own hand, but cannot enter the house as the person Upton expects.

The Warning

The note asks Upton to go to the Arkham Sanitarium and kill the person held there, insisting that it is no longer Edward Derby but Asenath. It discloses that Asenath had been dead for months, and that Derby had concealed her body in the cellar. It also explains why killing her had failed to end the danger: her soul, Derby believed, continued acting after death and was drawing him toward the body in which she had been buried.

Derby tells Upton that he went to the asylum because he recognized what was happening and feared the coming exchange. After awakening in Asenath’s corpse, he concluded that she had taken his body at the sanitarium and that the Hallowmass sacrifice had made the change permanent. His escape therefore carries two warnings at once. Upton must stop the person who now looks like Derby, and the body must be cremated, because Derby believes that otherwise the possessing force can endure and continue moving from body to body. He also urges Upton to keep away from black magic and apologizes for bringing the danger to his friend.

The note ends with a personal farewell and a plea for Upton to kill the entity. Derby says he is too far gone to speak or manage a telephone call, but still capable of writing; he hopes to reach Upton with a final warning before his body fails. Upton loses consciousness before reading the entire message, so its explanation reaches him in stages rather than as a single composed account.

Collapse and Consequences

After Upton has read the note, the messenger collapses at the threshold and no longer moves or shows consciousness. Upton faints again when he sees what remains there. The following morning, the butler calls the police; the collapsed figure is still where it fell, within Derby’s mismatched clothes. An examination finds remains that include bones and a skull, and dental work identifies the skull as Asenath’s. That identification confirms the physical link between the cellar corpse described in the note and the creature that came to Upton’s door, while leaving the reported transfer of souls to be understood through Derby’s account.

The escape does not reunite Derby and Upton or restore Derby’s body. Its consequence is instead a last transmission of knowledge: the familiar signal, handwriting, and personal farewell establish the caller’s connection to Derby, while the appearance and remains make that recognition horrifyingly incomplete. The scene also completes the chain of concealment and failed containment. Derby killed Asenath and hid her body, but death did not stop the pursuit; he escaped the cellar only to reach Upton at the end of his strength, leaving his friend to confront the possessed body at the sanitarium and the question of whether cremation could prevent the threat from continuing.