Louis I, Duke of Orléans
Erpingham was one of 17 named companions who volunteered to accompany Henry Bolingbroke into exile. He entrusted his lands and property to Sir Robert Berney and others. The party headed for Paris, where they were welcomed by Charles VI and presented with lavish gifts. Following the death of his father on 3 February 1399, Bolingbroke's inheritance was confiscated by Richard, and his banishment was increased by the King to life. On 17 June 1399, Erpingham witnessed a secret pact made in Paris between Bolingbroke and Louis I, Duke of Orléans, the brother of Charles VI, stating that as allies they would support each other against each other's enemies—the kings of England and France excepted.