The Adventure of the Red Circle (annotated)

The Adventure of the Red Circle is a classic Sherlock Holmes short story by Sir Arthur Conan Doyle. "Well, Mrs. Warren, I cannot see that you have any particular cause for uneasiness, nor do I understand why I, whose time is of some value, should interfere in the matter. I really have other things to engage me." So spoke Sherlock Holmes and turned back to the great scrapbook in which he was arranging and indexing some of his recent material.