anticipations in inconspicuous parts of the speech. In a long sentence, for instance, slips of the tongue would be of the kind in which the last word intended influences the sound of an earlier word. This gives an impression of a certain impatience to be done with the sentence, and in general it points to a certain resistance against the communication of this sentence, or the speech altogether. From this we come to border-line cases, in which the differences between the psycho-analytical and the ordinary physiological conception of slips of the tongue become merged. We assume that in these cases a disturbing tendency is opposing the intended speech; but it can only betray its presence and not what its own purpose is. The interference which it causes follows some sound-influence or associative connection and may be regarded as a distraction of attention away from the intended speech. But neither in this distraction of attention, nor in the associative tendency which has been activated, lies the essence of the occurrence; the essence lies rather in the hint the occurrence gives of the presence of some other intention interfering with the intended speech, the nature of which cannot in this case be discovered from its effects, as is possible in all the more pronounced cases of slips of the tongue. Slips of the pen, to which I now turn, are so like slips of the tongue in their mechanism that no new points of view are to be expected from them. Perhaps a small addition to our knowledge from this group will content us. Those very common little slips of the pen, contractions, anticipations of later words, particularly of the last words, point to a general distaste for writing and to an impatience to be done; more pronounced effects in slips of the pen allow the nature and intention of the interference to be recognized. In general, if one finds a slip of the pen in a letter one knows that the writer’s mind was not working smoothly at the moment; what was the matter one cannot always establish. Slips of the pen are frequently as little noticed by those who make them as slips of the tongue. The following observation is striking in this connection. There are, of course, some persons who have the habit of always re-reading every letter they write before sending it. Others do not do this; but if the latter make an exception and re-read a letter they then always have an opportunity of finding and correcting a striking slip of the pen. How is this to be explained? It almost looks as if such people knew that they had made a slip in writing the letter. Are we really to believe that this is so?