The Hound of the Baskervilles
What is the plot of chapter 6 ?
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Holmes does not believes that the Desmond man - who would inherit Sir Henry's estate - is involved, but he believes that Barrymore and his wife are viable suspects. It is much better to look at the GradeSaver summary for this chapter for a good sense of what happened than for me to give you a short explanation. check out the GradeSaver link below:
http://www.gradesaver.com/the-hound-of-the-baskervilles/study-guide/summary-chapter-vi