I had intended "The Adventure of the Abbey Grange" to be the last of those exploits of my friend, Mr. Sherlock Holmes, which I should ever communicate to the public. This resolution of mine was not due to any lack of material, since I have notes of many hundreds of cases to which I have never alluded, nor was it caused by any waning interest on the part of my readers in the singular personality and unique methods of this remarkable man. The real reason lay in the reluctance which Mr. Holmes has shown to the continued publication of his experiences. So long as he was in actual professional practice the records of his successes were of some practical value to him, but since he has definitely retired from London and betaken himself to study and bee-farming on the Sussex Downs, notoriety has become hateful to him, and he has peremptorily requested that his wishes in this matter should be strictly observed. It was only upon my representing to him that I had given a promise that "The Adventure of the Second Stain" should be published when the times were ripe, and pointing out to him that it is only appropriate that this long series of episodes should culminate in the most important international case which he has ever been called upon to handle, that I at last succeeded in obtaining his consent that a carefully guarded account of the incident should at last be laid before the public.