During this period, he published several works on mnemonics, including De umbris idearum (On the Shadows of Ideas, 1582), Ars Memoriae (The Art of Memory, 1582), and Cantus Circaeus (Circe's Song, 1582).
Under denna tid publicerade han flera verk om mnemonik, som De umbris idearum (Om ideernas skugga, 1582), Ars Memoriae (Minnets konst, 1582) och Cantus Circaeus (Circes sånger, 1582).