The Hound Of The Baskervilles Level 3

"Sir Charles Baskerville was the Lord of the Baskerville Hall. When he died under mysterious circumstances, his friend Dr. Mortimer asked Sherlock Holmes and his assistant Dr. Watson to solve the mystery. Holmes doesn't believe the ancient curse of the Baskervilles, but Dr. Mortimer seems to. Can Holmes solve the mystery before another Baskerville is killed?"