Dr. Watson is startled to find his friend Sherlock Holmes there, disguised as an old man apparently trying to extract information from the addicts in the den. Holmes is on the scent of a man who is living a double life. This story in unique among Holmes tales in two ways. First, it turns out that no crime has been committed and there is no villain Secondly, and unlike in his other stories, Holmes does not explain how he solved the mystery, but leaves it to the intelligent reader to work it out.
"Narrator a Little Over the Top"
Sherlock Holmes and Dr. Watson are in Boscombe Valley to investigate the death of Mr. Charles McCarthy. Inspector Lestrade, of Scotland Yard, whose meagre abilities are often upstaged by Holmes's brilliant deductions, has concluded that it is a murder, and that McCarthy's son James is the killer. The facts point to something much more complicated, however,and Holmes employs his keen powers of deduction to unravel a tangle of questions and put Lestrade to shame yet again.