Three autograph documents, two poems and a dialogue, from the highly influential French writer and philosopher, known as a key figure in existentialism.  The texts are written on small notebook leaves, and come from the collection of Michelle Vian, one of Sartre's long-term mistresses who remained close to him throughout the later years of his life.  The first poem, a nonsense rhyme, begins: "En Afghanistan / Il y avait un Khan..."  The second document is a dialogue or fragment of a dialogue between two characters, Negrine and Stephane, with a note on the verso in another hand.  Finally, a nonsense song penned in an unknown hand, "Je suis un con... un con... un con... / Con d'avoir composé cett' chanson / Cette chanson... / faite par un con / pour....our charmer les cons..." ("I am an idiot... an idiot... an idiot..An idiot for having composed this song / This song / composed for an idiot / to...charm idiots.") dated July 27, 1957, most probably Sartre's text penned in the hand of his lover, Michelle Vian. Each on a notebook leaf, 9 x 15 cm.  Slight toning; otherwise in fine condition.