Research on Letters in Scarlet

"A Study in Scarlet" is a novella by the famous British detective novelist Conan Doyle. It tells the story of Dr. Watson, who was injured and retired from the battlefield in Afghanistan, and Sherlock Holmes shared an apartment at No. 221 B Baker Street, London. Soon, he discovered that this person had the power of careful observation and extraordinary reasoning and analysis ability beyond ordinary people. At the same time, there were often some mysterious visitors coming in and out of their apartment. Until one day, they were involved in a murder case. The reasoning of this work is fascinating, the structure is ups and downs, the characters are vivid, and it touches on the social reality of Britain at that time.