“I have not yet described to you the most singular part. About six years ago—to be exact, upon the 4th of May, 1882—an advertisement appeared in the _Times_ asking for the address of Miss Mary Morstan and stating that it would be to her advantage to come forward. There was no name or address appended. I had at that time just entered the family of Mrs. Cecil Forrester in the capacity of governess. By her advice I published my address in the advertisement column. The same day there arrived through the post a small card-board box addressed to me, which I found to contain a very large and lustrous pearl. No word of writing was enclosed. Since then every year upon the same date there has always appeared a similar box, containing a similar pearl, without any clue as to the sender. They have been pronounced by an expert to be of a rare variety and of considerable value. You can see for yourselves that they are very handsome.” She opened a flat box as she spoke, and showed me six of the finest pearls that I had ever seen. “Your statement is most interesting,” said Sherlock Holmes. “Has anything else occurred to you?” “Yes, and no later than to-day. That is why I have come to you. This morning I received this letter, which you will perhaps read for yourself.” “Thank you,” said Holmes. “The envelope too, please. Postmark, London, S.W. Date, July 7. Hum! Man’s thumb-mark on corner,—probably postman. Best quality paper. Envelopes at sixpence a packet. Particular man in his stationery. No address. ‘Be at the third pillar from the left outside the Lyceum Theatre to-night at seven o’clock. If you are distrustful, bring two friends. You are a wronged woman, and shall have justice. Do not bring police. If you do, all will be in vain. Your unknown friend.’ Well, really, this is a very pretty little mystery. What do you intend to do, Miss Morstan?” “That is exactly what I want to ask you.” “Then we shall most certainly go. You and I and—yes, why, Dr. Watson is the very man. Your correspondent says two friends. He and I have worked together before.” “But would he come?” she asked, with something appealing in her voice and expression. “I should be proud and happy,” said I, fervently, “if I can be of any service.” “You are both very kind,” she answered. “I have led a retired life, and have no friends whom I could appeal to. If I am here at six it will do, I suppose?” “You must not be later,” said Holmes. “There is one other point, however. Is this handwriting the same as that upon the pearl-box addresses?” “I have them here,” she answered, producing half a dozen pieces of paper.