In October 1570, as a result of the Peace of Saint Germain, Ferrières was able to return to Paris. After some of his servants were attacked there, he went to Boubige in Poitou. In February 1572 he was at La Ferté, but shortly thereafter returned to Paris, where he remained in the Faubourg Saint-Germain, mistrusting the King's promises for the safety of the Huguenots. After an attempted assassination of Admiral Gaspard de Coligny, Ferrières took the King to task for the 'cowardice' of the attack, and the following day urged that the Admiral, and all Protestants, should leave Paris. His advice was ignored, and the St Bartholomew's Day Massacre occurred that night. Ferrières, his brother-in-law, Jean de La Fin, and ten others, including according to Arber, Richard Eden, escaped, fleeing first to La Ferté, and from thence to the coast where they found a ship to take them to England. Ferrières arrived in London on 7 September 1573.