There were a large number of supplements, broadsides and advertising materials produced in the course of E. Armand’s various periodical publishing ventures and the existing bibliographies, perhaps understandably, incomplete and sometimes confusing with regard to these items. The first group of documents listed here come from early in Armand’s career and relate to l’Ère Nouvelle. Most can be found in the digitized archives of the IISH. [Charles Hotz papers, folder 183]

There are several more known supplements to l’Ère Nouvelle, which I will add as I can confirm their particulars. And then I can begin on the considerably more complicated job of sifting through the material published for l’en dehors.