When, later, the King was surrounded by enemies, and he felt the necessity for having some secret place where he could conceal papers of importance which might yet fall into the hands of the rabble if the palace was again invaded, as it had been at Versailles, he sent for Gamain to make for him an iron chest in a place of concealment, that could only be opened by one knowing the secret of the lock. Unfortunately, the man was not as trustworthy as Louis XVI. supposed. Surrounded by those who had adopted the principles of the Revolution, and being a man without strong mind, he followed the current, and in 1792 he was nominated member of the Council General of the Commune of Versailles, and on September 24 he was one of the commissioners appointed "to cause to disappear all such paintings, sculptures, and inscriptions from the monuments of the Commune as might serve to recall royalty and despotism." The records of the debates of the Communal Council show that Gamain attended regularly and took part in the discussions, which were often tumultuous. The Queen heard of Gamain's Jacobinism, and warned the King, who, however, could not believe that Gamain would betray him. Marie Antoinette insisted on the most important papers being removed from the iron chest, and they were confided to Mme. de Campan. When the trial of the King was begun, on November 20, Gamain went to Roland, Minister of the Interior, and told him the secret of the iron chest. Roland, alarmed at the consequences of such a discovery, hastened to consult his wife, who was in reality more minister than himself. From August 10, a commission had been appointed to collect all the papers found in the Tuileries; this commission, therefore, ought to be made acquainted with the discovery; but here lay the danger. Mme. Roland, as an instrument of the Girondins, feared that among the papers in the chest might be discovered some which would show in what close relations the Girondins stood to the Court. She decided that her husband should go to the Tuileries, accompanied by Gamain, an architect, and a servant. The chest was opened by the locksmith, Roland removed all the papers, tied them up in a napkin, and took them home. They were taken the same day to the Convention; and the commission charged the minister with having abstracted such papers as would have been inconvenient to him to deliver up. When Roland surrendered the papers he declared, without naming Gamain, that they had been discovered in a hole in the wall closed by an iron door, behind a wainscot panel, in so secret a place "that they could not have been found had not the secret been disclosed by the workman who had himself made the place of concealment." On December 24 following, Gamain was summoned to Paris by the Convention to give his evidence to prove that a key discovered in the desk of Thierry de Ville-d'Avray fitted the iron chest.