He then sat down and commenced a letter, in which he recommended himself to his commanding officer for his good conduct and bravery, and made application for the military medal. This letter was written with many mistakes in it, but these were identical as regards expression and orthography with all that we have seen him make in his healthy state. While the patient was writing, he aided us in an experiment that encouraged to immediately examine in what degree the sense of sight assisted in the performance of this action. The facility with which he traced his letters, and followed the lines upon the paper, left no doubt concerning the exercise of vision upon the writing; but, in order to make the proof satisfactory, we have several times interposed a thick plate of sheet-iron between his hands and his eyes when he was writing; and, although all the visual rays were intercepted, he did not immediately break off the line he had begun; he still continued to trace a few words written in an almost illegible manner with the letters entangled in each other; then finally he stopped without manifesting either discontent or impatience. The obstacle removed, he finished the uncompleted line, and began another. _The sense of sight was therefore in full activity, and essential to the written expression of the patient._” Other observations showed that the sense of sight was only roused at the instance of touch, and that its exercise remained limited to those objects alone with which it was actually connected by the touch. On another occasion he passed through a long ward of patients, “taking indiscriminately every article that came within his reach, and concealing them afterwards under the quilt, under a mattress, under a chair-cover, and under a pile of sheets. Arrived in the garden, he took from his pocket a book of cigarette papers, opened it, and detached a leaf from it; then took out his tobacco and rolled a cigarette with the dexterity of one who is accustomed to this proceeding. He searched for his match-box, lighted his cigarette with a match, which falling still burning on the ground, he extinguished by placing his foot upon it; then smoked his cigarette while strolling back and forth to the entire extent of the garden, without any of these actions presenting the slightest deviation in their manner from the ordinary method. Everything that he did was the faithful reproduction of his ordinary round of life.