A young lady, Miss Mary Morstan, contact Sherlock Holmes for his help regarding her father, captain Morstan, who disappeared 10 years ago. Since his disappearance she annually receives a valuable pearl by post from an unknown person. The mystery leads Holmes and doctor Watson into an intricate plot regarding a lost treasure belonging to four convicts on the Andaman Islands. Written by
Did You Know?
Holmes compares Watson's accounts of their adventures as like working a love story into the Fifth Proposition of Euclid. This is the theorem that the angles opposite the equal sides of an isosceles triangle are themselves equal. See more
When Holmes, Watson and the police sail out on the police launch to lay in wait for the Aurora they sail upstream and under the Westminster Bridge as indicated by Big Ben and the Houses of Parliament in the background. Yet the Aurora was hidden at a ship yard near the Tower Bridge, and when the hunt begins the Tower of London is visible in the background. Both Tower Bridge and the Tower of London are located down the river from Westminster Bridge. See more
Dr. John Watson
Very pretty young woman crossing the street. And I think she may be coming here.
Incidentally, I have glanced over your latest account of my work.
Dr. John Watson
Honestly, I cannot congratulate you upon it. Detection is, or ought to be, an exact science. Observation, deduction, a cold unemotional subject. You have attempted to tinge it with romanticism which has much the same effect as if you'd worked a love-story or an elopement into the fifth proposition of Euclid.