Edouard Seguin worked in murdering.
The Sign of the Four -LRB- 1890 -RRB- , also called The Sign of Four , is the second novel featuring Sherlock Holmes written by Sir Arthur Conan Doyle .. Arthur Conan Doyle. Arthur Conan Doyle. Sherlock Holmes. Sherlock Holmes. novel. novel. Sir Arthur Conan Doyle. Arthur Conan Doyle. Doyle wrote four novels and 56 stories starring the fictional detective .