(_c_) The following is seemingly a serious case of _lapsus calami_, which it would be equally correct to describe as an erroneously carried out action. I intended to withdraw from the postal savings bank the sum of 300 crowns, which I wished to send to an absent relative to enable him to take treatment at a watering-place. I noted that my account was 4,380 crowns, and I decided to bring it down to the round sum of 4,000 crowns, which was not to be touched in the near future. After making out the regular cheque I suddenly noticed that I had written not 380 crowns, as I had intended, but exactly 438 crowns. I was frightened at the untrustworthiness of my action. I soon realized that my fear was groundless, as I had not grown poorer than I was before. But I had to reflect for quite a while in order to discover what influence diverted me from my first intention without making itself known to my consciousness. First I got on a wrong track: I subtracted 380 from 438, but after that I did not know what to do with the difference. Finally an idea occurred to me which showed me the true connection. 438 is exactly 10 per cent. of the entire account of 4,380 crowns! But the bookseller, too, gives a 10 per cent. discount! I recalled that a few days before I had selected several books, in which I was no longer interested, in order to offer them to the bookseller for 300 crowns. He thought the price demanded too high, but promised to give me a final answer within the next few days. If he should accept my first offer he would replace the exact sum that I was to spend on the sufferer. There is no doubt that I was sorry about this expenditure. The emotion at the realization of my mistakes can be more easily understood as a fear of growing poor through such outlays. But both the sorrow over this expense and the fear of poverty connected with it were entirely foreign to my consciousness; I did not regret this expense when I promised the sum, and would have laughed at the idea of any such underlying motive. I should probably not have assigned such feelings to myself had not my psychoanalytic practice made me quite familiar with the repressed elements of psychic life, and if I had not had a dream a few days before which brought forth the same solution. (_d_) Although it is usually difficult to find the person responsible for printers’ errors, the psychologic mechanisms underlying them are the same as in other mistakes. Typographical errors also well demonstrate the fact that people are not at all indifferent to such trivialities as “mistakes,” and, judging by the indignant reactions of the parties concerned, one is forced to the conclusion that mistakes are not treated by the public at large as mere accidents. This state of affairs is very well summed up in the following editorial from the _New York Times_ of April 14, 1913. Not the least interesting are the comments of the keen-witted editor, who seems to share our views:-- “A BLUNDER TRULY UNFORTUNATE.