Here the book returns to the adventures in Brittany, to tell how Lord Charles of Blois laid siege to the city of Rennes.

As you've heard, the Duke of Normandy, the Duke of Bourbon, the Duke of Burgundy, the Count of Blois, Lord Louis of Spain, the Constable of France and the other French lords had left Brittany after they'd taken the mighty castle of Champtoceaux and then the city of Nantes and captured the Count of Montfort and delivered him to King Philip of France, who had imprisoned him in the Louvre at Paris; and Lord Charles of Blois had stayed quietly at Nantes and in the surrounding country which was now obedient to him, waiting for the summer, a better season than winter for campaigning and waging war. Now you should know that, with the return of that sweet season, all the above-named lords of France and many others made their way back to Brittany in great strength to help Lord Charles of Blois to reconquer the rest of the duchy. Many remarkable adventures followed, as you'll now be able to hear.

When they reached Nantes they found Lord Charles of Blois and decided to lay siege to the city of Rennes, and there they went. The valiant Countess of Montfort had provisioned and garrisoned the city so well that it wanted for nothing, and had appointed as its governor and captain a worthy knight named Sir guillaume de Cadoudal, a Breton gentleman of high standing.