In exploring the finding at the origin of this volume, namely that of a philosophical void where French romanticism is concerned, this paper aims to show that this —relative — void is less due to French romanticism itself than to the lack of interest —if not downright ignorance — of philosophers for it, and, to illustrate the idea, focuses on showing how, each in his own way, two poets, key figures of this romanticism, Nerval and Baudelaire, have contributed to what one can call the invention of the unconscious.