April 23, 1898: Violet Smith contacted Sherlock Holmes. [SOLI]
My friend, who loved above all things precision and concentration of thought, resented anything which distracted his attention from the matter in hand. And yet without a harshness which was foreign to his nature it was impossible to refuse to listen to the story of the young and beautiful woman, tall, graceful, and queenly, who presented herself at Baker Street late in the evening and implored his assistance and advice. It was vain to urge that his time was already fully occupied, for the young lady had come with the determination to tell her story, and it was evident that nothing short of force could get her out of the room until she had done so. With a resigned air and a somewhat weary smile Holmes begged the beautiful intruder to take a seat and to inform us what it was that was troubling her.
Date information provided by the volume A Day-by-Day Chronology of Mr. Sherlock Holmes, according to Zeisler and Christ, compiled and edited by William S Dorn.