 They included men such as Jean de Mailly, now the Bishop of Noyon, who had converted to Charles' cause in 1443, but in 1431 had signed letters in the name of King Henry VI of England, guaranteeing English protection to all those who had participated in the case against Joan.An even greater obstacle was Raoul Roussel, archbishop of Rouen, who had been a fervent supporter of the English cause in Normandy and had participated in Joan's trial, until he too took an oath of loyalty to Charles in 1450.Bouillé only managed to summon seven witnesses – Guillaume Manchon, Isambart de la Pierre, Martin Ladvenu, Guillaume Duval, Jean Toutmouillé, Jean Massieu, and Jean Beaupere – when his inquiry was suddenly broken off in March 1450.