U.S.A.-Entire (1901) Heptasophs. Postal card (N) with printed notice on back of meeting of Somerville Conclave, No. 476, Improved Order of Heptasophs. The Heptasophs were one of the first fraternal orders in America, founded in 1852, the name derived from Latin meaning Seven Wise Men. (ImageA)

FRANCE-Deluxe proof (1935) Intellectuals. Deluxe sheet with glassine overlay. Aid to intellectuals. Scott No B42, Yvert No 307. (ImageA)

ETATS UNIS-Entire (1941) Hypnotisme. Automobiles anciennes. Entier publicitaire (O) à 1 cent. 'The Institute of Mentalphysics.' (ImageA)

FRANCE-Artist proof (1943) Intellectuals. Die proof in black. Aide aux Intellectuels charity issue with inscription 'Au coin du table.' (ImageA)

FRANCE-Deluxe proof (1949) Montesqueiu. Deluxe sheet. Scott No B238, Yvert No 853. (ImageA)

FRANCE-Artist proof (1957) Auguste Comte. Die proof in violet signed by the engraver MAZELIN. Scott No 848, Yvert No 1121. (ImageA)

FRANCE-Deluxe proof (1959) Henri Bergson. Deluxe sheet. Scott No 934, Yvert No 1225. His work challenged the mechanistic view of nature and he is sometimes claimed to have anticipated relativity theory. (ImageA)

FRANCE-Deluxe proof (1979) Simone Weil. Deluxe sheet. Scott No B518, Yvert No 2032a. (ImageA)

FRANCE-Deluxe proof (1981) Pierre Teilhard de Chardin. Deluxe sheet. Scott No B537, Yvert No 2152. Jesuit priest who took part in discovery of Peking man. (ImageA)

FRANCE-Deluxe proof (1996) René Descartes. Bloc gommé. Scott No 2512, Yvert No 2995. (ImageA)

FRANCE-Artist proof (2005) Pierre Bayle. Stage die proof in sepia signed by the engraver BEAUJARD. Scott No 3207, Yvert No 3901. (ImageA)