Mary Morstan has received a pearl in the post every year since her father's disappearance. This leads Holmes and Watson to the truth about a secret pact between four convicts during the Indian Rebellion of 1857.
2024
1957
2005
1993
1960
1992
2007
2002
1999
1997
1979
1950
2001
2006
2004
—
2003
