工程师的拇指 The Adventure of the Engineer's Thumb （一）

Of all the problems which have been submitted to my friend, Mr.,Sherlock Holmes, for solution during the years of our intimacy,,there were only two which I was the means of introducing to his,notice--that of Mr. Hatherley's thumb, and that of Colonel,Warburton's madness. Of these the latter may have afforded a,finer field for an acute and original observer, but the other was,it may be the more worthy of being placed upon record, even if it,gave my friend fewer openings for those deductive methods of,reasoning by which he achieved such remarkable results. The story,has, I believe, been told more than once in the newspapers, but,,like all such narratives, its effect is much less striking when,