Her sense of touch has sensibly increased during the year, and has gained in acuteness and delicacy. Indeed, her whole body is so finely organized that she seems to use it as a medium for bringing herself into closer relations with her fellow creatures. She is able not only to distinguish with great accuracy the different undulations of the air and the vibrations of the floor made by various sounds and motions, and to recognize her friends and acquaintances the instant she touches their hands or clothing, but she also perceives the state of mind of those around her. It is impossible for any one with whom Helen is conversing to be particularly happy or sad, and withhold the knowledge of this fact from her. She observes the slightest emphasis placed upon a word in conversation, and she discovers meaning in every change of position, and in the varied play of the muscles of the hand. She responds quickly to the gentle pressure of affection, the pat of approval, the jerk of impatience, the firm motion of command, and to the many other variations of the almost infinite language of the feelings; and she has become so expert in interpreting this unconscious language of the emotions that she is often able to divine our very thoughts. In my account of Helen last year, I mentioned several instances where she seemed to have called into use an inexplicable mental faculty; but it now seems to me, after carefully considering the matter, that this power may be explained by her perfect familiarity with the muscular variations of those with whom she comes into contact, caused by their emotions. She has been forced to depend largely upon this muscular sense as a means of ascertaining the mental condition of those about her. She has learned to connect certain movements of the body with anger, others with joy, and others still with sorrow. One day, while she was out walking with her mother and Mr. Anagnos, a boy threw a torpedo, which startled Mrs. Keller. Helen felt the change in her mother's movements instantly, and asked, "What are we afraid of?" On one occasion, while walking on the Common with her, I saw a police officer taking a man to the station-house. The agitation which I felt evidently produced a perceptible physical change; for Helen asked, excitedly, "What do you see?"