 In 1854 he provided a description of a psychiatric disorder involving both manic and depressive episodes in the same individual, a condition that he referred to as "folie à double forme" (dual-form insanity).Unbeknownst to him at the time, another French psychiatrist, Jean-Pierre Falret (1794-1870), had described fundamentally the same condition (with a number of salient differences) in an article prior to Baillarger's findings.Falret referred to the disorder as "folie circulaire" (circular madness).