As Stemmermann says, out of the general literature there is not much from which one can deduce any principles of prognosis. But, again, we would insist that one of the great weaknesses has been that earlier studies have not carefully distinguished between the mentally normal and the abnormal cases of pseudologia phantastica. When, for instance, Forel speaks of pathological liars as being constitutionally abnormal individuals who are not curable, he fails to differentiate where profitable differentiation can be made. If our own work is of any practical value it is in offering safer grounds for prognosis and treatment. Stemmermann summarizes well her follow-up work done upon cases seen years previously by other observers. Some of these are still in institutions. After a period of well- doing several of these have become backsliders and reverted again to lying and swindling. Very few appear to have been cured, but yet some of the facts of betterment are most convincing. This author states that, at the most, one dares to ponder over the point as to whether there are not cases which recover, particularly when the pathological lying is a phenomenon of adolescence. Our own material is, in part, too recently studied to form anything like a generalization concerning prognosis. Many years have to elapse before one can be sure there is not going to be a recurrence. But one is not altogether certain that prognostic generalizations are of practical worth for this group of mentally normal pathological liars. So many incidental factors of physical, mental, and social life, with all of the complicated background of the same, come in to make the total result, that experiment and trial with the individual case, while hesitating to give an exact prognosis, is perhaps the only sane procedure. What we do know definitely is the immensely favorable outcome in Cases 1, 4, 7, 19, and the promising betterment in several other instances--all in direct contradiction to what we had expected from survey of previous literature. In several of these cases the years have gone by with nothing but steady improvement. The difficulty in getting adequate treatment, either in home life or by the necessary individual attention elsewhere, makes it impossible to say that many of the others also could not have been favorably influenced. Frequently a total alteration of environmental conditions is necessary, and this, of course, is often very difficult to obtain. Also it is extremely rare that one can get the whole matter, and its sure social consequences, fairly and squarely met by anybody with influence over the individual. Until this can be done, little in the way of good results may ever be expected. The splendid attack made by relatives or others upon the situation in Cases 1, 4, 7, possibly 14, and 19 tells the story of the prime necessity for adequate handling of pathological lying.