★ 6.3
★ 7.5
★ 1.3
★ 5.0
★ 6.8
★ 8.2
★ 6.4
★ 5.9
★ 6.2
★ 7.1
★ 4.0
★ 5.2
★ 6.1
★ 7.2
★ 6.7
★ 6.9
★ 5.8
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.
