Wassermann reaction serum positive. Examination of spinal fluid: clear, globulin ++++, albumin ++++; cells, 130 per cmm.; small lymphocytes, 79.9%; large lymphocytes, 14.1%; polymorphonuclear leucocytes, 4.6%; plasma cells, 0.7%; endothelial cell, 0.7%. W. R. positive. Gold sol reaction, 55555522 +-. =Mental Examination.= On admission patient showed great psychomotor activity, was very playful, marked flight of ideas, was expansive, very emotional, very erotic. She slept very little, appetite was poor, and she lost weight rapidly. Orientation and memory intact. No hallucinations elicited. In about three weeks improvement began, and at the end of eight weeks she appeared practically recovered. On April 9, 1915,—that is, 13 weeks after admission,—she was allowed home on visit. On leaving, she appeared normal in every way. There was no evidence of psychotic symptoms, she had good insight, and physically there was absolutely nothing of a neurological nature that was abnormal. This case, with the history of a previous depression and its clinical picture during the acute stage, and its recovery, is certainly in every respect typical of manic-depressive insanity, and only the positive result of the six tests causes us to put it in the group of GENERAL PARESIS. Only the further course will shed any light as to the correct significance of these findings, and even then we shall not be too sure that we had not been dealing with a manic-depressive psychosis in a latent neurosyphilitic. We would strongly emphasize the point that at the present time this patient presents no mental or physical signs of cerebrospinal syphilis or general paresis; but the six tests are still positive. This case differs from the ordinary general paresis remission in that there is not a single physical sign of paresis present. There are many transitional cases between this case which shows no symptoms or signs of neurosyphilis except the laboratory tests, and the typical case of general paresis. Thus we have cases with slight character change and no physical signs except rare “seizures.” On the other hand, in many cases the presence of abnormal neurological phenomena without definite mental signs is first noted. Certain remitted cases show only some slight pupillary or reflex abnormality. We believe we have here added the last link in the chain between the primary and quaternary symptoms. This case is illustrative of several which we have published elsewhere under the name of _paresis sine paresi_ or latent neurosyphilis to illustrate how all the laboratory signs of neurosyphilis may be present in a patient without any physical or mental symptoms that may be correlated with these findings. We summarize our discussion of this as follows: