He has left us two detailed accounts of the proceedings of the council of St Basle; and, despite his reticence, it is impossible to doubt that he was the moving spirit in Arnulf's deposition.
Then followed the council of St Basle, near Reims, at which Arnulf confessed his treason and was degraded from his office (17th June 991).
There he married Anne de Tserclaes, and later on he proceeded by way of Basle to Zurich, where his Zwinglian convictions were confirmed by constant intercourse with Zwingli's successor, Bullinger.