Bulletin d'informations proustiennes, no 17, Les Ventes:
"An exceptionally important sale took place at Nouveau Drouot on 22
November 1985.
106. Autograph manuscript entitled 'Les Principautés roumaines' (about 1892?). 6 p. in-folio and 1 p. 1/2 in-4. Prepartory notes for an account or a study on the Romanian Principalities, for a course at the École libre des Sciences politiques."
Livres anciens et illustrés modernes, manuscrits et lettres autographes, Drouot 20 Feb 2020, lot 280. With partial transcript.