sentences:  After the initial conquest of 1088, Bernard continued warring with Brycheiniog until 1090, probably supported by Richard fitz Pons, the lord of Clifford.Talgarth was captured early and a castle was constructed at Bronllys where the rivers Dulais and Llynfi meet, a site probably central to the "llys" of the "tywysog" of the commote of Bronllys.By 1091 Bernard had reached the valley of the Usk, which was at the centre of the kingdom which was to become his own principality.