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The Valley of Fear · Chapter

The Warning explained

Holmes receives a cipher message from his informant Porlock, who is connected to the criminal mastermind Professor Moriarty.

What happens

Holmes receives a cipher message from his informant Porlock, who is connected to the criminal mastermind Professor Moriarty. Porlock sends a coded warning but then withdraws, fearing Moriarty's suspicion. Holmes deduces the cipher refers to a common almanac, but initially fails to decode it using the current year's edition, realizing Porlock likely used the previous year's almanac.

Themes in this chapter

  • Fear and Terror

    Porlock's terror of Moriarty is evident in his trembling handwriting and his decision to abandon the communication.

  • Crime and Justice

    Holmes's efforts to prevent crime through advance intelligence from Porlock highlight the struggle between law and organized crime.

Characters to notice

  • Sherlock Holmes

    Receives and analyzes a cipher message from Porlock, deducing it refers to a common almanac.

  • Dr. Watson

    Present with Holmes, observes the cipher and participates in the deduction process.

  • Fred Porlock

    Sends a cipher message and a subsequent letter withdrawing his help, fearing Moriarty's suspicion.

  • Professor Moriarty

    Referenced as the sinister figure behind Porlock, the 'He' whom Porlock fears.

Key passages

  • Porlock, Watson, is a nom-de-plume, a mere identification mark; but behind it lies a shifty and evasive personality.

    Porlock is a pseudonym for a person who is unreliable and hard to pin down.

    Holmes explains Porlock's role as an informant with a hidden identity.

  • The greatest schemer of all time, the organizer of every deviltry, the controlling brain of the underworld, a brain which might have made or marred the destiny of nations—that’s the man!

    Moriarty is the ultimate criminal mastermind, orchestrating all evil and possessing a genius that could have shaped history.

    Holmes describes Professor Moriarty's immense criminal influence and intellect.

  • I will go no further in this matter. It is too dangerous—he suspects me.

    I cannot continue helping you; the risk is too great because he is becoming suspicious of me.

    Porlock's letter withdrawing from the communication due to fear of Moriarty.

The Valley of Fear — The Warning Explained