Discuss the importance of the following statement in light of the extract.
The trio − Holmes, Dr. Watson, and Mary decide to visit Lyceum Theatre.
Mary comes to meet Sherlock with a case. For the past six years, an anonymous person has been sending a pearl to Mary on the same day each year. However, this year, she has received a letter from the anonymous sender requesting her to go to the third pillar from the left, outside the Lyceum Theatre. The letter suggested that Mary had been wronged in some way and that she shall have justice. Though the sender warned Mary not to inform the police, he did tell her that she could have two friends accompany her. At this point, Mary is curious about the meeting but at the same time, the prospect of meeting a stranger alone is obviously unsettling. Thus, as a compromise, she decides to not call the police but enlists the help of a detective, Holmes, to accompany her. They both agree and the trio decides to visit Lyceum Theatre. This statement is important because Mary’s decision to approach Holmes and his subsequent approval to accompany her lead to the unveiling of the mystery of the anonymous sender and of the bigger, main plot of the novel.