In another one of this man's stories, the title character is mugged by a student who wants to rid Naples of the aristocracy as a part of the Camorra.  
He wrote about a funny-named character who says "Merciful!" before dying of heart failure, and that character had previously survived a shipwreck and married the title character of the story.  In another one of this man's stories, the title character is mugged by a student who wants to rid Naples of the aristocracy as a part of the Camorra.  In addition to "Amy Foster" and "Il Conde," this man wrote a story in which Leggatt and the sea captain who shelters him bear an uncanny resemblance to each other, "The Secret Sharer." Other characters in this man's works include Charles Gould, Mr. Verloc, and Kurtz.  FTP, name this author of The Secret Agent, Nostromo, and Heart of Darkness.
He wrote about a funny-named character who says "Merciful!" before dying of heart failure, and that character had previously survived a shipwreck and married the title character of the story.  
Joseph {Conrad} (pistol-whip anyone giving the Polish name) (1) [AH]