The envoys on the part of Philip were the Prince of Orange, the Duke of Alva, the Bishop of Arras, Ruy Gomez de Silva, the president Viglius; on that of the French monarch, the Constable, the Marshal de Saint Andre, the Cardinal de Lorraine, the Bishop of Orleans, and Claude l'Aubespine.
There were also envoys sent by the Queen of England, but as the dispute concerning Calais was found to hamper the negotiations at Cercamp, the English question was left to be settled by another congress, and was kept entirely separate from the arrangements concluded between France and Spain.
The death of Queen Mary, on the 17th November, caused a temporary suspension of the proceedings.

After the widower, however, had made a fruitless effort to obtain the hand of her successor, and had been unequivocally repulsed, the commissioners again met in February, 1559, at Cateau Cambresis.

The English difficulty was now arranged by separate commissioners, and on the third of April a treaty between France and Spain was concluded.
By this important convention, both kings bound themselves to maintain the Catholic worship inviolate by all means in their power, and agreed that an oecumenical council should at once assemble, to compose the religious differences, and to extinguish the increasing heresy in both kingdoms.
Furthermore, it was arranged that the conquests made by each country during the preceding eight years should be restored.

Thus all the gains of Francis and Henry were annulled by a single word, and the Duke of Savoy converted, by a dash of the pen, from a landless soldier of fortune into a sovereign again.

He was to receive back all his estates, and was moreover to marry Henry's sister Margaret, with a dowry of three hundred thousand crowns.