At a later period of his life Chassenée was reminded of the legal principle thus laid down and urged to apply it in favour of clients more worthy of its protection than a horde of vagrant rodents. In 1540 he was president of the judicial assembly known as the Parliament of Provence on a memorable occasion when the iniquitous measure for the extirpation of heresy by exterminating the Waldenses in the villages of Cabrières and Merindol was under discussion. One of the members of the tribunal, a gentleman from Arles, Renaud d’Alleins, ventured to suggest to the presiding officer that it would be extremely unjust to condemn these unfortunate heretics without granting them a hearing and permitting an advocate to speak in their defence, so that they might be surrounded by all the safeguards of justice, adding that the eminent jurist had formerly insisted upon this right before the court of Autun and maintained that even animals should not be adjudged and sentenced without having a proper person appointed to plead their cause. Chassenée thereupon obtained a decree from the king commanding that the accused Waldenses should be heard; but his death, which occurred very soon afterwards, changed the state of affairs and prevented whatever good effects might have been produced by this simple act of justice. [Cf. Desnoyers: _Recherches_, etc. (_vide_ Bibliography), p. 18.] In the report of the trial published in the _Thémis Jurisconsulte_ for 1820 (Tome I. pp. 194 sqq.) by Berriat Saint-Prix, on the authority of the celebrated Jacques Auguste De Thou, President of the Parliament of Paris, the sentence pronounced by the official is not recorded. But whatever the judicial decision may have been, the ingenuity and acumen with which Chassenée conducted the defence, the legal learning which he brought to bear upon the case, and the eloquence of his plea enlisted the public interest and established his fame as a criminal lawyer and forensic orator.