Source: https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/2-1-1-chapter-1

[Revision notes](https://senecalearning.com/en-gb/revision-notes.md) › [GCSE](https://senecalearning.com/en-gb/revision-notes/gcse.md) › [English Lit](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature.md) › [AQA](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa.md) › [English Lit: AQA GCSE The Sign of the Four](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four.md) › Chapter 1

# Chapter 1

English Lit: AQA GCSE The Sign of the Four, topic 2.1.1

## Chapter 1: The Science of Deduction

We meet Sherlock Holmes, who opens the story by injecting cocaine into his arm. Although Dr Watson watches this regularly, he becomes more and more annoyed that Holmes is taking the drugs.

### Holmes' defence

![Holmes' defence](https://image-v2.cdn.app.senecalearning.com/2018-09/73d35e89-2ebd-4dbd-a75a-18d839fe0b06/brain-1845962_1920.jpg)

- Sherlock Holmes explains that he feels he must take drugs to stimulate his brain – he cannot live without something occupying his brain: __‘My mind… rebels at stagnation’__.
 - A Victorian audience may admire Holmes here – he wants to constantly focus on solving problems, specifically criminal cases, by using his very intelligent brain to figure out clues and evidence. 
 - They may have compared him to the Victorian police, who seemed incompetent and idiotic.

### Holmes' view of his work

![Holmes' view of his work](https://image-v2.cdn.app.senecalearning.com/memory-location-images/Paris,%20France-min.jpeg)

- Sherlock Holmes talks about being the __‘only unofficial consulting detective’__ in the world. He is acting as an international consultant, helping detective services in France.

### Holmes' detective work

![Holmes' detective work](https://image-v2.cdn.app.senecalearning.com/2025-11/d3f995f8-0b45-4447-b20e-0a193c3a5a25/cb9818bc-cd75-46da-9b22-bfeefa25c7e7.png)

- Holmes continues discussing his work – he details his work on the different types of tobacco ash and the distinction between different footprints.
 - This would interest a Victorian audience as, unlike the police force themselves, Holmes has begun to use a type of forensic investigation to solve his cases.

### Watsons' test

![Watsons' test](https://image-v2.cdn.app.senecalearning.com/2018-10/a579586f-1cc8-43d2-b387-69189447f0b5/pocket-watch-clock-.jpg)

- To test Holmes’ intelligence and powers of deduction, Watson gives him a watch and asks him to give his ideas on the watch’s previous owner. 
- Using his detective skills, Holmes determines that the previous owner was Watson’s older brother who inherited it from his father. He also suggests that Watson’s brother was careless, lived in poverty, and died due to alcoholism.

### Miss Mary Morstan's arrival

![Miss Mary Morstan's arrival](https://image-v2.cdn.app.senecalearning.com/2018-10/023ccc9d-1cfb-47a8-87d5-056668d4c552/caller-fourty-door-40-.jpg)

- There is a knock on the door. 
- The landlady enters and announces that Miss Mary Morstan has called to see Sherlock Holmes.

## Key Quotations from Chapter 1

Here are three key quotations from Chapter 1:

### Chapter title

![Chapter title](https://image-v2.cdn.app.senecalearning.com/courseImages/biology/5.2.1%20-%20The%20nervous%20system/brain-1845940_640-min.jpg)

- __‘The Science of Deduction’__.
 - The chapter heading immediately tells us that we will read about the art of putting clues and evidence together to draw one’s own conclusions. 
 - This is presented as a science, a factual method for Holmes to solve problems. 
 - In this chapter, Holmes demonstrates how detection and deduction really work, showing the reader exactly how his brain works and how intelligent he is.

### Cocaine

![Cocaine](https://image-v2.cdn.app.senecalearning.com/2018-07/a5c75f5e-115b-4750-a260-e711b81e093b/drugs-alcohol-addiction-crime.jpg)

- __‘Hence the cocaine. I cannot live without brain-work’__ (Sherlock Holmes).
 - Holmes makes it clear that he needs something to keep his brain going. He needs problems to solve and interesting things to engage his mind, or he feels that he cannot cope with life itself.

### Shocking habit

![Shocking habit](https://image-v2.cdn.app.senecalearning.com/2018-09/94dce3fa-fd49-461f-9451-2af29753c121/question-2736480_1920.jpg)

- __‘I never guess. It’s a shocking habit’__ (Sherlock Holmes).
 - This is perhaps a direct reference to the incompetency of the Victorian police.
 - Holmes seems disgusted by the idea of just making guesses to solve problems – instead, throughout the story, he highlights the importance of basing inferences and ideas on solid facts and evidence. 
 - By referring to guessing as a bad __‘habit’__, he suggests that those who begin to use guesswork are doomed to failure forever, as their incompetence, like their guessing, also becomes a routine.

## Test yourself on Chapter 1

- How does _The Sign of the Four_ open?
- Who arrives at the end of Chapter 1 to visit Holmes and Watson?
- Events of Chapter 1
- What does Sherlock Holmes deduce about Watson's brother in Chapter 1?
- What does Sherlock Holmes call a '__shocking habit__' in Chapter 1?

[Practise this topic for free](https://app.senecalearning.com/classroom/course/8c61eecf-31b6-4e1a-b05b-6301a2fa6941/section/014f4870-183d-4371-a335-3325052a25ac/session)

- Previous topic: [1.1.8 End of Topic Test - Victorian London & Empire](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/1-1-8-end-of-topic-test-victorian-london-and-empire.md)
- Next topic: [2.1.2 Chapter 2](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/2-1-2-chapter-2.md)

## English Lit: AQA GCSE The Sign of the Four contents

### 1 Context
- 1.1 Victorian England & British Empire
  - [1.1.1 Author Background](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/1-1-1-author-background.md)
  - [1.1.2 Victorian Crime & Police](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/1-1-2-victorian-crime-and-police.md)
  - [1.1.3 Historical Context](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/1-1-3-historical-context.md)
  - [1.1.4 Victorian London](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/1-1-4-victorian-london.md)
  - [1.1.5 Women](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/1-1-5-women.md)
  - [1.1.6 The British Empire](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/1-1-6-the-british-empire.md)
  - [1.1.7 End of Topic Test - Author & Victorian Police](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/1-1-7-end-of-topic-test-author-and-victorian-police.md)
  - [1.1.8 End of Topic Test - Victorian London & Empire](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/1-1-8-end-of-topic-test-victorian-london-and-empire.md)

### 2 Plot Summary
- 2.1 Chapter Summaries
  - [2.1.1 Chapter 1](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/2-1-1-chapter-1.md)
  - [2.1.2 Chapter 2](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/2-1-2-chapter-2.md)
  - [2.1.3 Chapter 3](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/2-1-3-chapter-3.md)
  - [2.1.4 Chapter 4](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/2-1-4-chapter-4.md)
  - [2.1.5 Chapter 5](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/2-1-5-chapter-5.md)
  - [2.1.6 Chapter 6](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/2-1-6-chapter-6.md)
  - [2.1.7 Chapter 7](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/2-1-7-chapter-7.md)
  - [2.1.8 Chapter 8](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/2-1-8-chapter-8.md)
  - [2.1.9 Chapter 9](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/2-1-9-chapter-9.md)
  - [2.1.10 Chapter 10](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/2-1-10-chapter-10.md)
  - [2.1.11 Chapter 11](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/2-1-11-chapter-11.md)
  - [2.1.12 Chapter 12](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/2-1-12-chapter-12.md)
  - [2.1.13 Chapter 12: Jonathan Small's Stories](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/2-1-13-chapter-12-jonathan-smalls-stories.md)
  - [2.1.14 End of Topic Test - Chapters 1-6](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/2-1-14-end-of-topic-test-chapters-1-6.md)
  - [2.1.15 End of Topic Test - Chapters 7-12](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/2-1-15-end-of-topic-test-chapters-7-12.md)

### 3 Characters
- 3.1 Key Characters
  - [3.1.1 Sherlock Holmes](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/3-1-1-sherlock-holmes.md)
  - [3.1.2 Sherlock Holmes: Quotations](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/3-1-2-sherlock-holmes-quotations.md)
  - [3.1.3 Dr John Watson](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/3-1-3-dr-john-watson.md)
  - [3.1.4 Mary Morstan](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/3-1-4-mary-morstan.md)
  - [3.1.5 End of Topic Test - Key Characters](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/3-1-5-end-of-topic-test-key-characters.md)
  - [3.1.6 Exam-Style Questions - Mary & Dr Watson](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/3-1-6-exam-style-questions-mary-and-dr-watson.md)
- 3.2 Other Characters
  - [3.2.1 Thaddeus Sholto](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/3-2-1-thaddeus-sholto.md)
  - [3.2.2 Jonathan Small](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/3-2-2-jonathan-small.md)
  - [3.2.3 End of Topic Test - Thaddeus and Jonathan Small](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/3-2-3-end-of-topic-test-thaddeus-and-jonathan-small.md)
- 3.3 Grade 9 - Key Characters
  - [3.3.1 Grade 9 - Key Characters](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/3-3-1-grade-9-key-characters.md)
  - [3.3.2 Extract Analysis - Tonga](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/3-3-2-extract-analysis-tonga.md)

### 4 Key Themes
- 4.1 Key Themes
  - [4.1.1 Corruption](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/4-1-1-corruption.md)
  - [4.1.2 Criminals & Victims](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/4-1-2-criminals-and-victims.md)
  - [4.1.3 Victorian Fear](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/4-1-3-victorian-fear.md)
  - [4.1.4 British Empire & Imperialism](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/4-1-4-british-empire-and-imperialism.md)
  - [4.1.5 Duality](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/4-1-5-duality.md)
  - [4.1.6 End of Topic Test - Key Themes](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/4-1-6-end-of-topic-test-key-themes.md)

### 5 Writing Techniques
- 5.1 Writing Techniques
  - [5.1.1 Narrative Voice](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/5-1-1-narrative-voice.md)
  - [5.1.2 Dialogue](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/5-1-2-dialogue.md)
  - [5.1.3 Structure](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/5-1-3-structure.md)
  - [5.1.4 Structure & Characters](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/5-1-4-structure-and-characters.md)
  - [5.1.5 Pathetic Fallacy](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/5-1-5-pathetic-fallacy.md)
  - [5.1.6 End of Topic Test - Writing Techniques](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/5-1-6-end-of-topic-test-writing-techniques.md)

### 6 Recap: Main Quotes
- 6.1 Characters Quotes
  - [6.1.1 Sherlock Holmes - Quotations](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/6-1-1-sherlock-holmes-quotations.md)
  - [6.1.2 Dr John Watson - Quotations](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/6-1-2-dr-john-watson-quotations.md)
  - [6.1.3 Mary Morstan - Quotations](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/6-1-3-mary-morstan-quotations.md)
  - [6.1.4 Thaddeus Sholto - Quotations](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/6-1-4-thaddeus-sholto-quotations.md)
  - [6.1.5 Jonathan Small - Quotations](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/6-1-5-jonathan-small-quotations.md)
- 6.2 Text Structure - Quotes
  - [6.2.1 Chapter 1 - Quotations](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/6-2-1-chapter-1-quotations.md)
  - [6.2.2 Chapter 2 - Quotations](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/6-2-2-chapter-2-quotations.md)
  - [6.2.3 Chapter 3 - Quotations](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/6-2-3-chapter-3-quotations.md)
  - [6.2.4 Chapter 4 - Quotations](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/6-2-4-chapter-4-quotations.md)
  - [6.2.5 Chapter 5 - Quotations](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/6-2-5-chapter-5-quotations.md)
  - [6.2.6 Chapter 6 - Quotations](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/6-2-6-chapter-6-quotations.md)
  - [6.2.7 Chapter 7 - Quotations](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/6-2-7-chapter-7-quotations.md)
  - [6.2.8 Chapter 8 - Quotations](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/6-2-8-chapter-8-quotations.md)
  - [6.2.9 Chapter 9 - Quotations](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/6-2-9-chapter-9-quotations.md)
  - [6.2.10 Chapter 10 - Quotations](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/6-2-10-chapter-10-quotations.md)
  - [6.2.11 Chapter 11 - Quotations](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/6-2-11-chapter-11-quotations.md)
  - [6.2.12 Chapter 12 - Quotations](https://senecalearning.com/en-gb/revision-notes/gcse/english-literature/aqa/the-sign-of-the-four/6-2-12-chapter-12-quotations.md)