This shows the conclusion of Louis' diplomatic efforts to effect a reconciliation between the English king and his archbishop - see also the version of this scene at Sens
Curiously, the CVMA survey (Recensement II, p.291) describes this as 'the betrothal of Henry of England and Marguerite of France'. One wonders which of the two fine masculine figures whose hands are being joined by the French king they mistook for Princess Marguerite...