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.
They fell on them and defeated the Welsh, killing 800 to 1,000 men and capturing Owen ap Gruffydd ap Rhisiant, Glyndwr's Secretary and John Hanmer, Glyndwr's brother in law, who both survived the battle but were imprisoned in the Tower of London.
Pontrilas railway station served the village of Pontrilas, Herefordshire, England, and Ewyas Harold, Herefordshire, and a little distance Grosmont, Monmouthshire, Wales and was on the Welsh Marches Line between Hereford and Abergavenny.
Grosmont | Grosmont, Monmouthshire | Henry of Grosmont, 1st Duke of Lancaster | Grosmont Castle | Henry of Grosmont |
The first attempts to produce oil from the Grosmont dates back to the 1970s, when the Alberta Oil Sands Technology and Research Authority and industry partners Union Oil Canada and Chevron Resources Canada conducted an unsuccessful production pilot.
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.