Série 2. No.
- Pièce remise par le Cabinet de Vienne, F* 7566.
- Lettres d'un Voyageur à l'Abbé Barruel, p. 30 (1800).
- World Revolution, pp. 86 and following, where extracts from the correspondence of the Alta Vendita (or Haute Vente Romaine) were given. This correspondence will be found in L'Église Romaine en face de la Révolution, by Crétineau Joly, who published it from the documents seized by the Pontifical Government at the death of one of the members. The documents were communicated to Crétineau Joly by the Pope Grégoire XVI, and published with the approval of Pius IX. Their authenticity has never been questioned. They are still in the secret archives of the Vatican, or at any rate were there at the beginning of the present