These images are also a secret presence in the text of James' Dictionary, one of the first where the manic depressive cycle is given as a truth proven by observation, a unity easily discernible to any unprejudiced scrutiny: There is an absolute necessity for reducing Melancholy and Madness to the Species of disorder, and consequently considering them in one joint view, since, from daily observation, and Experience, we find, that they both arise from the same common cause and origin this doctrine is confirmed by daily Experience and acute Observation, since we find that melancholic patients, especially if their disorder is inveterate, easily fall into madness, which, when removed, the melancholy again discovers itself, though the madness afterwards returns at certain periods.