J. S. Fletcher 
The Charing Cross Mystery 

Joseph Smith Fletcher (1863 — 1935) was an English journalist and author. He wrote more than 230 books on a wide variety of subjects, both fiction and non-fiction, and was one of the most prolific English writers of detective fiction.
(from wikipedia.org)

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Joseph Smith Fletcher (1863 — 1935) was an English journalist and author. He wrote more than 230 books on a wide variety of subjects, both fiction and non-fiction, and was one of the most prolific English writers of detective fiction.