ABSTRACT: If research devoted to the clandestine literature of the seventeenth and eighteenth centuries is today enjoying considerable expansion in the scholarly world, it tends, nonetheless, to be restricted to materialist considerations. However, other themes are open to exploration, such as the immaterialist one which is explicitly mentioned in two manuscripts. After presenting and analyzing these two texts, we argue that this clandestine account of immaterialism could explain both the evolution of this theory during the Enlightenment and the misunderstanding of (...) Berkeley’s philosophy. (shrink)