In the first place, I must confess that there is nobody who makes the interpretation of dreams his main business. In what circumstances, then, do we come to interpret them? At times we may occupy ourselves, for no particular purpose, with the dreams of a friend, or we may work out our own dreams over a period of time in order to train ourselves for psycho-analytic work; but chiefly we have to do with the dreams of nervous patients who are undergoing psycho-analytic treatment. These last dreams provide splendid material and are in no respect inferior to those of healthy persons, but the technique of the treatment obliges us to subordinate dream-interpretation to therapeutic purposes and to desist from the attempt to interpret a large number of the dreams as soon as we have extracted from them something of use for the treatment. Again, many dreams which occur during the treatment elude full interpretation altogether; since they have their origin in the whole mass of material in the mind which is as yet unknown to us, it is not possible to understand them until the completion of the cure. To relate such dreams would necessarily involve revealing all the secrets of a neurosis; this will not do for us, since we have taken up the problem of dreams in preparation for the study of the neuroses. Now I expect you would willingly dispense with this material and would prefer to listen to the explanation of dreams of healthy persons or perhaps of your own. But the content of these dreams makes that impossible. One cannot expose oneself, nor anyone whose confidence has been placed in one, so ruthlessly as a thorough interpretation of a dream would necessitate; for, as you already know, they touch upon all that is most intimate in the personality. Apart from the difficulty arising out of the nature of the material, there is another difficulty as regards relating the dreams. You are aware that the dream seems foreign and strange to the dreamer himself; how much more so to an outsider to whom his personality is unknown. The literature of psycho-analysis shows no lack of good and detailed dream-analyses; I myself have published some which formed part of the history of certain pathological cases. Perhaps the best example of a dream-interpretation is that published by O. Rank, consisting of the analysis of two mutually-related dreams of a young girl. These cover about two pages of print, while the analysis of them runs into 76 pages. It would need almost a whole term’s lectures in order to take you through a work of this magnitude. If we selected some fairly long and considerably distorted dream we should have to enter into so many explanations, to adduce so much material in the shape of associations and recollections, and to go down so many sidetracks, that a single lecture would be quite unsatisfying and would give no clear idea of it as a whole. So I must ask you to be content if I pursue a less difficult course, and relate