Barrymore thinks that it was unfair to follow the convict. Sir Henry Baskerville promises not to inform the police. Sir Henry gives Barrymore and his wife some old suits from him for the convict. As they return, Barrymore talks about the night Sir Charles Baskerville’s died. He found a letter, which was from Coomber Tracey, a neighbour village. It was from a lady with the initials "L.L." The letter was burned but Barrymore found a piece which said that Sir Charles should be at the gate by 10 o’clock. Dr. Watson is really excited and immediately writes to his friend Holmes in Baker Street. Dr. Watson always sends the news to his friend. He asks Dr. Mortimer about the initials L.L. He says that the daughter of Mr. Frankland is called Laura Lyons. She married an artist named Lyons, who came sketching on the moor. He proved to be a blackguard and deserted her. Her father refused to have anything to do with her, because she had married without his consent. Some people of Devonshire helped her to come to an honest living. Watson visits Laura to find out more. In the mysterious letter to Sir Charles, Laura wrote that she wanted to meet him at the ally, because he might help her to get divorced. She did not know that he had intended to travel to London. When she found it out she wanted to see him on the last possible moment. But Laura didn’t show up at the appointment.

On his way home from Coomber Tracey, Mr. Frankland invites Dr. Watson for a glass of wine. He tells him about British laws and the fact that he often observes a small boy out in the moor with his telescope. He takes a bundle with food with him. So Dr. Watson gets very curious. After the visit he goes to the moor. Frankland has told him about a hiding place. It is a circle of old stone hunts. He supposes to find the convict there. Instead of the man he finds Sherlock Holmes, who hides in these stone huts. He has never been in Baker Street. He investigates the mysterious case from the moor. The boy, a young man helps him. He also brings all the letters from Dr. Watson. They research on parallel lines. Holmes has found out that Miss. Stapleton is the wife and not the sister of Mr. Stapleton. That was the reason why Mr. Stapleton was against the love from Henry Baskerville. Mr. Sapleton is the enemy. He had followed them in the taxi in London and she wrote this mysterious letter. Mr. Stapleton has really much power over his wife. Suddenly they hear a terrible scream out of the silence of the moor. They start running over the moor to see what had happened. Then they discover the body of Sir. Henry Baskerville. They climb on the top of the rock over which their poor friend has fallen because the hound has chased him. But as they turn the body over they see that it isn’t Sir. Henry. It is the convict, who has worn Sir. Henry’s clothes. It was Mr. Stapleton who has stolen the boot in London. He gave it the hound, so that the hound knows sir. Henry’s smell. after a while a figure approaches them over the moor. It is Mr. Stapleton who is surprised to see the body of the convict and not that of Sir. Henry.

The next day Holmes and Watson tell Mr. Baskerville that they wanted to go to London and would return the next day. But they all have an invitation for dinner by the Sapletons. Holmes ask Henry to excuse them for this dinner. They want Sir. Henry to go to the dinner alone and to walk home alone through the moor. Instead of going to London they stay at Devonshire., however. They want Mr. Stapleton to believe that they aren’t here that night when Sir. Henry walks over the moor shortly afterwards. Holmes and Dr. Watson discover a family picture in the house. Mr. Stapleton is a family member – a Baskerville! He would be the heir to the enormous value of the estate if sir Henry dies. They visit ones more Laura Lyons. They find out that Mr. Stapleton had held Laura back to go to the appointment this special evening. So he could let the hound over poor Sir. Charles.

In the evening Holmes and Dr. Watson hide near Mr. Stapleton’s house in the moor. They watch the dinner. Then Mr. Henry comes out. It is a dark and foggy night. Suddenly a dreadful shape springs out from the shadow of the fog and chases Sir. Henry. Holmes shots it. It’s a big dog, not a supernatural hound. Mr. Stapleton has bought it in London. He flees into the moor and is never seen again.