This article is emulating fictional informal notes that the author would have taken during his research. The handwritten annotations of Marinus de Jong (1891-1984), and his artistic and pedagogical legacy, have formed an interesting case study within the Flemish Archive for Annotated Music (FAAM) at the Royal Conservatoire of Antwerp. The “making of” the documentary Imaginary Conversation with Marinus de Jong, recorded together with pianist Anna Alvizou, is presented in a playfully manner.