my name among others on the cover had published a ruinous review of a book by my friend F____ of Berlin, from the pen of a very juvenile reviewer. I communicated with the editor, who, indeed, expressed his regret, but would not promise any redress. Thereupon I broke off my connection with the paper; in my letter of resignation I expressed the hope that our personal relations would not suffer from this. Here is the real source of the dream. The derogatory reception of my friend's work had made a deep impression upon me. In my judgment, it contained a fundamental biological discovery which only now, several years later, commences to find favor among the professors.

3. A little while before, a patient gave me the medical history of her brother, who, exclaiming “Nature, Nature!” had gone out of his mind.