Character Analysis — Supporting Characters

While Holmes and Watson dominate The Sign of Four, the supporting characters serve essential dramatic, thematic, and structural functions. Understanding their roles — and how they relate to the protagonists — is key to a sophisticated GCSE response.

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Character Relationship Map

               SHERLOCK HOLMES
              /        |        \
         partner    client    rival
            /          |          \
       DR WATSON   MARY MORSTAN   ATHELNEY JONES
           |           |
       proposes to  daughter of
           |           |
       MARY MORSTAN  CAPT. MORSTAN
                       |
                   served with
                       |
                   MAJOR SHOLTO
                   /          \
               father of   father of
               /              \
        THADDEUS SHOLTO   BARTHOLOMEW SHOLTO
                               |
                          murdered by
                               |
                            TONGA
                               |
                         accomplice of
                               |
                         JONATHAN SMALL

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Mary Morstan — The Ideal Victorian Woman

Mary Morstan is a key character who embodies Victorian ideals of femininity while also displaying notable independence and courage.

Mary's key qualities