Publication includes reproductions of A. Dupont's "Nathalie et Justine" and "L'Art en Ciel," and I. Isou and A. Dupont's "Concerto pour Oeil et Oreille" which are held by the Sackner Archive. -- Source of annotation: Marvin or Ruth Sackner.

In this document, Lemaitre expresses unhappiness with Chopin's chapter in the exhibition catalogue of University of Iowa's exhibition on Lettrism. This is stored with Curtay's materials. -- Source of annotation: Marvin or Ruth Sackner.