 Earlier, he had acquired Dundryfan manor from his lord, Maurice de Londres, for services rendered, and had built the first stone building, Dunraven Castle, on the site.Arnold's service to Maurice de Londres was the defence of Ogmore Castle while the lord defended against Welsh insurgence, led by Princess Gwenllian ferch Gruffydd, at Kidwelly Castle.The le Boteler/Butler family crest can be seen in plasterwork in St. Illtud's Church, Pembrey.