To help him conquer the land he was also granted his elder brother's lordships of the Trilateral of Skenfrith, Grosmont and White Castle together with Monmouth.
At one time the river was noted for its substantial brown trout population, with the length from Pontrilas to Skenfrith producing record catches.
He is on record during May and June as taking the 'Three Castles'—Grosmont, Skenfrith, and Whitecastle in South Wales, which belonged to Prince Edward.
William de Braose, (or William de Briouze), 4th Lord of Bramber (1144/1153 – 9 August 1211), court favourite of King John of England, at the peak of his power, was also Lord of Gower, Abergavenny, Brecknock, Builth, Radnor, Kington, Limerick, Glamorgan, Skenfrith, Briouze in Normandy, Grosmont, and White Castle.