[History of a letter addressed to the Academy of Medicine of Paris].

The author presents an autograph manuscript sent from Laval by Dr Hubert to Paris Academy of medicine in which he reports the birth of a freak who died at birth during a difficult delivery. This freak is, according to our contemporary classifications, a thoraco pagus who represents from 70 to 73% of symmetrical conjoined monmphalic twins. The address mentioned is that of the first location of the Academy. He gives explanations concerning both the Academy and Dr Hubert, a Parisian MD who was a regular contributor. He goes on explaining how it was received by Professor Adelon, then annual secretary. The letter sets up in the margin a commission offamous scientists such as Geoffroy Saint-Hilaire, Serres et Antoine Dubois. The case was presented to the Academy during the session of 17 november 1829. Though the Academy does not seem to have been able to keep detailed archives of that period, the Archives Générales de Médecine lets us know the reactions.