Letter, from Moise Charas to Henry Oldenburg, dated at Paris Autograph letter Uncertain of whether Oldenburg has received a copy of his book on vipers, Charas sends another volume and asks Oldenburg to reserve judgment until he has read a review of it in 'Journal des Scavans' Charas explains why he does not agree with Monsieur Denis's view of his work, particularly regarding the venom of vipers 7 April 1672