First mass newspaper in France, Le Petit Journal, founded in 1863 by Millaud, will take advantage of the Troppmann Affair, an assassination which has occurred in 1869, to increase its readership. During the coverage of the investigation, the main columnist of Petit Journal, Thomas Grimm, daily operate a "spectacularisation" of the newspaper and of its readership. The analysis of this exaltation and instrumentalisation of popular makes it possible to throw light on the particularities of the reflexive and selfsatisfied mass-media speeches, and to sketch out an archaeology of our contemporary media field. Indeed, in spite of its outdatedness stylistic, the Grimms column, analyzed here, makes argument of the audience its leitmotiv, and ...