April 19, 1888: Holmes, Watson, and Altheney Jones chased the launch Aurora down the river Thames. [SIGN]
“And there is the Aurora,” exclaimed Holmes, “and going like the devil! Full speed ahead, engineer. Make after that launch with the yellow light. By Heaven, I shall never forgive myself if she proves to have the heels of us!”
April 19, 1888: Tonga was shot and killed by Holmes or Watson (or both). [SIGN]
“Fire if he raises his hand,” said Holmes, quietly.
We were within a boat’s-length by this time, and almost within touch of our quarry. I can see the two men now as they stood: the white man with his legs far apart, shrieking out curses, and the unhallowed dwarf with his hideous face and his strong, yellow teeth gnashing at us in the light of our lantern.
It was well that we had so clear a view of him. Even as we looked he plucked out from under his covering a short, round piece of wood, like a school-ruler, and clapped it to his lips. Our pistols rang out together. He whirled round, threw his arms in the air, and, with a kind of choking cough, fell sideways into the stream. I caught one glimpse of his venomous, menacing eyes amid the white swirl of the waters.
Date provided by A Day-by-Day Chronology of Mr. Sherlock Holmes, according to Zeisler and Christ, compiled and edited by William S Dorn.