After this incounter, the duke tooke the towne of Beaumont le vicount, and manned all the fortresses on the frontiers of his enimies, and with rich booties and prisoners returned againe to the duke of Yorke. In this meane time the lord Talbot, besieging the towne of Diepe, inuironed it with déepe trenches; building also vpon the mount Paulet a strong and noisome bastile. But at length perceiuing the towne to be stronglie defended, and that he lacked such furniture of men, vittels and ordinance as was necessarie for the winning of it, he deliuered the custodie of the bastile, with the gouernance of the siege to his bastard sonne, a valiant yoong gentleman, and departed to Rone for aid, monie, and munition. The French king aduertised hereof, sent his sonne the Dolphin of Vienne with the earle of Dunois, and fiftéene thousand men to raise the siege from Diepe. [Sidenote: The earle of saint Paule reuolteth to the French.] Thrée daies they assailed the bastile, in the which six hundred Englishmen were inclosed, and at length bicause powder and weapon failed them within, the Frenchmen wan it, and tooke the bastard Talbot prisoner, with sir William Peitow, and sir Iohn Repleie, which shortlie after were redéemed. The other English souldiers séeing the bastile woone by the Frenchmen, stood all a daie in good order of battell, and in the night following, politikelie saued themselues and returned to Rone, without losse or damage. In the assaulting of the bastile, the Frenchmen saie, they slue two hundred Englishmen; and denie not but that they lost fiue hundred of their owne men, beside those that were hurt. Whilest these things were a dooing, Philip duke of Burgognie made sharpe warre against the earle of saint Paule, in taking from him his townes and castels, that made him to renounce his allegiance swoorne and promised to the king of England, and returned to the French part. [Sidenote: 1441.] [Sidenote: Tartas besieged.]