The railway signal-man of the title tells the narrator of an apparition that has been haunting him. Each spectral appearance precedes a tragic event on the railway on which the signalman works. The signalman's work is at a signal-box in a deep cutting near a tunnel entrance on a lonely stretch of the railway line, and he controls the movements of passing trains. When there is danger, his fellow signalmen alert him by telegraph and alarms. Three times, he receives phantom warnings of danger when his bell rings in a fashion that only he can hear. Each warning is followed by the appearance of the spectre, and then by a terrible accident.
The first accident involves a terrible collision between two trains in the tunnel. Dickens may have based this incident on the Clayton Tunnel crash that occurred in 1861, five years before he wrote the story. Readers in 1866 would have been familiar with this major disaster. The second warning involves the mysterious death of a young woman on a passing train. The final warning is a premonition of the signalman's own death.
The story begins with the narrator calling "Halloa! Below there!" into a railway cutting. The signalman standing on the railway below does not look up, as the narrator expects, but rather turns about and stares into the railway tunnel that is his responsibility to monitor. The narrator calls down again and asks permission to descend. The signalman seems reluctant.
The railway hole is a cold, gloomy, and lonely place. The signalman still seems to be in fear of the narrator, who tries to put him at ease. The signalman feels that he had seen the narrator before, but the narrator assures him that this is impossible. Reassured, the signalman welcomes the newcomer into his little cabin and the two men speak of the signalman's work. His labour consists of a dull monotonous routine, but the signalman feels he deserves nothing better, as he wasted his academic opportunities when he was young, although he has been spending his time during his shifts teaching himself mathematics and learning a foreign language (albeit with questionable pronunciation). The narrator describes that the signalman seems like a dutiful employee at all times, except when he twice looks at his signal bell when it's not ringing. There seems to be something troubling the signal man, but he will not speak of it. Before the narrator leaves, the signal man asks of him not to call for him when he's back on the top of the hill or when he sees him the following day.
The next day, as directed by the signalman, the narrator returns and does not call. The signalman tells the narrator that he will reveal his troubles. He is haunted by a recurring spirit which he has seen at the entrance to the tunnel on separate occasions, and, with each appearance, was followed by a tragedy. In the first instance, the signalman heard the same words which the narrator said and saw a figure with its left arm across its face, while waving the other in desperate warning. He questioned it, but it vanished. He then ran into the tunnel but didn't find anybody. A few hours later, there was a terrible train crash with many casualties. During its second appearance, the figure was silent, with both hands before the face in an attitude of mourning. Then a beautiful young woman died in a train passing through. Finally the signalman admits that he has seen the spectre several times during the past week.
The narrator is sceptical about the supernatural, and he suggests that the signalman is suffering from hallucinations. During their conversation, the signalman witnesses a ghost and hears his bell ring eerily, but the narrator sees and hears nothing. The signalman is sure that these supernatural incidents are presaging a third tragic event waiting to happen, and is sick with fear and frustration: he does not understand why he should be burdened with knowledge of an incipient tragedy when he, a minor railway functionary, has neither the authority nor the ability to prevent it. The narrator believes that his new friend's imagination has been overtaxed and suggests taking him to see a doctor.
The next day, the narrator visits the railway cutting again and sees a mysterious figure at the mouth of the tunnel. This figure is not a ghost, however. It's a man, one of a group of officials investigating an incident on the line. The narrator discovers that the signalman is dead, having been struck by an oncoming train. He had been standing on the line, looking intently at something, and failed to get out of the way. The driver of the train explains that he attempted to warn the signalman of his danger: as the train bore down on the signalman the driver called out to him “Below there! Look out! For God’s sake, clear the way!” Moreover, the driver waved his arm in warning even as he covered his face to avoid seeing the train strike the hapless signalman. The narrator notes the significance of the similarity between the driver's actions and the actions of the spectre as the signalman had earlier described them, but leaves the nature of that significance to the reader.
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The supernatural theme of the story may have been influenced[weasel words] by Dickens's own involvement in the Staplehurst rail crash on 9 June 1865. While passing over a viaduct in Kent, the train in which he was travelling jumped a gap in the line where the rails had been removed for maintenance, and the cast iron viaduct fractured, causing most of the carriages to fall into the river below. Dickens was in the first carriage that derailed sideways but did not fall completely – it was suspended at a precarious angle by the coupling of the coach in front and held up by the remains of the viaduct masonry. Dickens helped with the rescue of the other passengers, and was commended for his actions, but the experience had a profound effect on his subsequent life (which ended five years to the day later).
"The Signal-Man" was adapted by Andrew Davies as the BBC's Ghost Story for Christmas for 1976, with Denholm Elliott as the principal character. This production was filmed on the Severn Valley Railway; a fake signal box was erected in the cutting on the Kidderminster side of Bewdley Tunnel, and the interiors were filmed in Highley signal box. There is an anachronism in this production; Elliott as the principal character whistles "Tit Willow", a song from the Gilbert and Sullivan operetta The Mikado, which was written in 1885. On March 28th, 1969, Beyond Midnight (a South African radio program produced by Michael McCabe) aired the story as "The Train".
In 1979, English composer Andrew Lloyd Webber attempted to adapt the short story into a one-act musical, with the intent of having it performed as a double-bill alongside his monodrama Tell Me on a Sunday. However, the project was abandoned when Lloyd Webber found the subject matter too gloomy for a musical.[page needed] Later, in the early 2000s, Lloyd Webber made a second attempt at adapting The Signal-Man for the stage, this time as an operatic piece for the English National Opera company. This production did not materialize either, due to Lloyd Webber finding the source material unsuitable for the company. The material that Lloyd Webber had already written for the opera was instead combined with his 2004 musical adaptation of the Wilkie Collins novel The Woman in White. The show's prologue and finale are freely adapted from Dickens' original short story.
In the United States, the story was adapted for radio for the Columbia Workshop (23 January 1937), The Weird Circle (as "The Thing in the Tunnel", 1945), Lights Out (24 August 1946), Hall of Fantasy (10 July 1950), Suspense (4 November 1956) and Beyond Midnight (as "The Signalman", 1970) radio shows.
In 2015, Brazilian filmmaker Daniel Augusto adapted the short story into a 15-minute short film starring Fernando Teixeira in the title role. The film was shown as part of the Short Cuts program during the Toronto International Film Festival.
In 2019, the story was adapted into an audio drama as part of the debut season of "Shadows at the Door: The Podcast," where it was touted as 'arguably the greatest ghost story of all time'.
In India, this story has been transformed into a Hindi drama on radio by Vividh Bharati Services.
In the 2005 Doctor Who episode "The Unquiet Dead", in which the Doctor meets Charles Dickens, he mentions a particular fondness for "that one with the ghosts", clarifying that he means "The Signal-Man" (rather than A Christmas Carol as Dickens had assumed).
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- Inverne, James (15 September 2004). "The Woman in White Opens in London Sept. 15". Playbill. Retrieved 14 January 2019.
- Austin, Jeremy (2004). "Interview with Andrew Lloyd Webber". The Woman in White: Education Pack. p. 14.
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- "TIFF15 REVIEW: O sinaleiro [The Signalman]  - www.jaredmobarak.com". jaredmobarak.com. Retrieved 14 January 2019.
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