About the time this war broke out, Cambray, which had been delivered up to my brother by M. d’Ainsi, according to his engagement with me, as I have before related, was besieged by the forces of Spain.  My brother received the news of this siege at his castle of Plessis-les-Tours, whither he had retired after his return from Flanders, where, by the assistance of the Comte de Lalain, he had been invested with the government of Mons, Valenciennes, and their dependencies.

My brother, being anxious to relieve Cambray, set about raising an army, with all the expedition possible; but, finding it could not be accomplished very speedily, he sent forward a reinforcement under the command of M. de Balagny, to succour the place until he arrived himself with a sufficient force to raise the siege.  Whilst he was in the midst of these preparations this Huguenot war broke out, and the men he had raised left him to incorporate themselves with the King’s army, which had reached Gascony.

My brother was now without hope of raising the siege, and to lose Cambray would be attended with the loss of the other countries he had just obtained.  Besides, what he should regret more, such losses would reduce to great straits M. de Balagny and the gallant troops so nobly defending the place.

His grief on this occasion was poignant, and, as his excellent judgment furnished him with expedients under all his difficulties, he resolved to endeavour to bring about a peace.  Accordingly he despatched a gentleman to the King with his advice to accede to terms, offering to undertake the treaty himself.  His design in offering himself as negotiator was to prevent the treaty being drawn out to too great a length, as might be the case if confided to others.  It was necessary that he should speedily relieve Cambray, for M. de Balagny, who had thrown himself into the city as I have before mentioned, had written to him that he should be able to defend the place for six months; but, if he received no succours within that time, his provisions would be all expended, and he should be obliged to give way to the clamours of the inhabitants, and surrender the town.

By God’s favour, the King was induced to listen to my brother’s proposal of undertaking a negotiation for a peace.  The King hoped thereby to disappoint him in his expectations in Flanders, which he never had approved.  Accordingly he sent word back to my brother that he should accept his proffer of negotiating a peace, and would send him for his coadjutors, M. de Villeroy and M. de Bellievre.  The commission my brother was charged with succeeded, and, after a stay of seven months in Gascony, he settled a peace and left us, his thoughts being employed during the whole time on the means of relieving Cambray, which the satisfaction he found in being with us could not altogether abate.