It's possible you're thinking of one of these:
* "The Signal-Man," which features a mysterious and unsettling encounter with a railway worker who foretells his own death. It explores themes of communication, fear, and the uncanny.
* "The Wreck of the Golden Mary," which is a short story about a ship that is wrecked on a perilous shore. This story focuses on human resilience and the dangers of the sea.
* "The Haunted House," which is a spooky short story set in a seemingly abandoned house. It explores themes of fear, imagination, and the supernatural.
Please clarify the story you are referring to so I can provide a more accurate answer.
Once you tell me the specific story, I can help you understand how Dickens reveals the master personality. I can discuss the characters' motivations, their actions, and how Dickens uses literary techniques like dialogue, descriptions, and symbolism to portray their personalities.