# The Sign of the Four — Character guide

> Key figures in The Sign of the Four by Arthur Conan Doyle.

- [Sherlock Holmes](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/sherlock_holmes.md): Brilliant detective who takes on the case of the Agra treasure.
- [Dr. John Watson](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/dr_john_watson.md): Holmes's friend and chronicler, who falls in love with Mary Morstan.
- [Mary Morstan](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/mary_morstan.md): Young woman who seeks Holmes's help regarding her father's disappearance.
- [Jonathan Small](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/jonathan_small.md): One-legged man with a grudge, central to the Agra treasure mystery.
- [Thaddeus Sholto](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/thaddeus_sholto.md): Eccentric heir who reveals the secret of the Agra treasure.
- [Athelney Jones](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/athelney_jones.md): Scotland Yard detective who assists Holmes on the case.
- [Major John Sholto](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/major_sholto.md): Deceased army officer who once possessed the Agra treasure.
- [Captain Morstan](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/captain_morstan.md): Mary's father, a former officer who disappeared mysteriously.
- [Toby](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/toby.md): A keen-scented dog used by Holmes to track suspects.
- [Tonga](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/tonga.md): Andaman Islander who serves as Jonathan Small's deadly accomplice.
- [Mordecai Smith](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/mordecai_smith.md): Boat owner who helps the villains escape down the Thames.
- [Bartholomew Sholto](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/bartholomew_sholto.md): Thaddeus's twin brother, found dead in his locked room.
- [Wiggins](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/wiggins.md): Leader of the Baker Street Irregulars who helps track the Aurora.
- [Lal Chowdar](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/lal_chowdar.md): A Sikh soldier who was part of the Agra treasure conspiracy.
- [Abdullah Khan](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/abdullah_khan.md): One of the conspirators who stole the Agra treasure.
- [Muhammad Singh](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/muhammad_singh.md): A Sikh soldier involved in the Agra treasure plot.
- [Dost Akbar](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/dost_akbar.md): A Muslim soldier who helped steal the Agra treasure.
- [Achmet](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/achmet.md): A merchant who was killed for the Agra treasure.
- [Mrs. Smith](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/mrs_smith.md): Wife of Mordecai Smith, who helps run the boat business.
- [Sherman](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/sherman.md): Owner of Toby the dog, who lends him to Holmes.
- [McMurdo](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/mc_murdo.md): A boatman who provides information about the Aurora.
- [Dawson](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/dawson.md): A police constable who assists in the chase.
- [Williams](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/williams.md): A police constable involved in the pursuit.
- [François Le Villard](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/francois_le_villard.md): A French detective who admires Holmes's methods.
- [Jack](https://www.betterreads.online/discover/the_sign_of_the_four_se/characters/jack.md): A young boy who helps the Baker Street Irregulars.

HTML index: https://www.betterreads.online/discover/the_sign_of_the_four_se/characters