This article illustrates the results of a thorough cross-analysis of two particular archive records: those of Italian Masonry and that of the Senate of the Republic. The range of time taken into account is the first three-year period of the Fascist government, namely from the date of the March on Rome and ending on the proclamation of the law against the associations (November 1925). A detailed and for many aspects unexpected account emerges, from which the real ideological components and their fluctuations come into view. Moreover, such exclusive aspect of the relations between Fascism and Masonry, until now scarcely explored, sheds a more definitive light on the actual or supposed affiliation of such political characters, thanks to the “sifting” intervention carried out first and foremost on the sources of the Grand Orient of Italy’s Historical Archive, as well as on those of the Grand Lodge of Italy, of the State Central Archive and, obviously, of the Senate of the Republic’s Historical Archive.