Pierre-Daniel HUET (1630-1721), writer and philosopher, friend and collaborator of Mme de Lafayette; sub-preceptor of the Dauphin and bishop of Avranches, of the Académie française. 2 autograph manuscripts; 8 and 4 leaves in-4, with corrections and additions. Drafts of the plan and index of his philosophical treatise on the weakness of the human mind (De Imbecillitate Mentis Humanae Ad Philosophos Contubernales), a posthumous work of great importance (1723), which deeply divided his followers, to such an extent that his authorship was disputed, giving rise to a quarrel about the nature of Huet's skepticism. Manuscript abundantly corrected and worked. " Livre premier. The truth can be known by the human understanding, by the help of the Reason, with a perfect and whole certainty. Chapter I. It is necessary to show first: 1. what it is that Philosophy. 2. what human understanding is. 3. what is Idea. 4. what is Thought. 5. what is Reason. 6. what is Truth. 7. there are several kinds and degrees of certainty. The Certainty of Faith perfects the Certainty of human nature"... Etc. The manuscript of the Dissertatio De Imbecillitate... is preserved at the BnF, Manuscripts, Latin 6682.