Dr. Joseph Bell, a Scottish surgeon and lecturer, had an uncanny ability to “read” people based on their wardrobes, body language, and simple surveillance and examination.  This gift went well beyond a doctor’s usual skill to observe.  Bell was able to determine what patients did for a living, or what illness they might be suffering from, simply by glancing in their direction or by watching them for mere seconds.  His abilities made him famous amongst his peers, but a student of his would make him famous worldwide.