What was Robert Louis Stevenson working on when he died?

At the time of his sudden death from a cerebral hemorrhage in 1894, Robert Louis Stevenson was working on his novel Weir of Hermiston.1

Although left as an uncompleted fragment, the work was published posthumously in 1896 and is widely considered to be his masterpiece. The novel is noted for its psychological depth, masterful dialogue, and a prose style that represents a significant transition toward a new maturity in his literary career. Based on the notes he left behind, the story would have followed the protagonist, Archie, who is sentenced to death by his own father, a strict judge, after killing a friend who betrayed him.21