Modest, sceptical, and occasionally obscene in his Latin pieces and in his verses, he made himself a persona grata at the French court, where libertinism in ideas and morals was hailed with relish. Besides his educational works, he wrote "Jugement sur les anciens et principaux historiens grecs et latins" (1646); a treatise entitled "Du peu de certitude qu'il y a en histoire" (1668), which in a sense marks the beginning of historical criticism in France; and sceptical "Dialogues", published posthumously under the pseudonym of Orasius Tubero. An incomplete edition of his works was published at Dresden in 1756–1759.