Summary: A young woman of 20, bright mentally, strong physically, ``confessed'' to a professor of a university where she was studying that she had shot and killed a man. The facts were known to only three or four people and she was terribly worried about it all. Upon her information the affair was taken up by a group of professional men, one of them a lawyer of large practical experience. She aided in an investigation which attempted to uncover the ``white slave'' feature of the case. The data of verification proved most elusive. Later, the young woman implicated herself in a burglary, and altogether an elaborate story of her life was evolved. It was found that from early years she had been a great fabricator. While a first year student at a university Marie M. begged for an interview with one of her instructors at his home and there, with him and others, she told a detailed story of how some months previously she had escaped a difficult situation by killing a man. The exceedingly long account which was given at intervals to several professional men and enlarged upon in response to inquiry, or as the occasion otherwise demanded, we are not justified in taking space to retell. This case figures, as a whole, in somewhat anecdotal fashion among our others, we freely confess; it is cited to show the extent to which apparently purposeless fabrication can go. It has been found impossible to gain a satisfactory idea of the genesis of this young woman's tendency, quite in contrast to the other cases we have cited. It forms the only instance where we have drawn from our experience with merely partially studied cases.