Minor Characters
Mrs. Forrester
Mrs. Forrester employs Miss Morstan as a governess, but the relationship between the two women is more like that of close friends than employer and employee. Dr. Watson visits her home to give the two women information about the case and remarks upon its sanctuary-like qualities.
Mordecai Smith
Mordecai Smith is the proprietor of the Aurora boat and is portrayed as a common, working-class man. He agrees to help Jonathan Small and Tonga escape but is apprehended when Sherlock Holmes and his entourage run the boat aground.
Mrs. Hudson
Mrs. Hudson is the landlady and housekeeper at 221b Baker Street, the famous London address of Sherlock Holmes and Dr. Watson. She shows concern for Holmes when he grows increasingly agitated at the irresolution of the case.
Mrs. Bernstone
Mrs. Bernstone is the housekeeper and Pondicherry Lodge, the family of the Sholtos. When Sherlock Holmes, Dr. Watson, Miss Morstan and Thaddeus Sholto go to Pondicherry Lodge, they encounter a distressed Mrs. Bernstone who is worried that Bartholomew Sholto has not been out of his room all day.
Mahomet Singh
Mahomet Singh is an Indian man and one of the signatories of “the sign of the four.” He colluded with Jonathan Small, Abdullah Khan and Dost Akbar to seize the Agra treasure.
Dost Akbar
Dost Akbar is an Indian man and one of the signatories of “the sign of the four.” He lures the merchant—the man who is carrying the Agra treasure—into the trap set by the other men.