The subjects of his "Cahiers" entries often were, surprisingly, reflections on science and mathematics. In fact, arcane topics in these domains appear to have commanded far more of his considered attention than his celebrated poetry. The "Cahiers" also contain the first drafts of many aphorisms he later included in his books. To date, the "Cahiers" have been published in their entirety only as photostatic reproductions, and only since 1980 have they begun to receive scholarly scrutiny. The "Cahiers" have been translated into English in five volumes published by Peter Lang with the title "Cahiers/Notebooks".