John Horace Round, 1911 Encyclopædia Britannica, Volume 10… (1911)
“ In 1227 he was one of the earls who rose against him on behalf of his brother Richard and made him restore the forest charters, and in 1237 he was one of the three counsellors forced on the king by the barons. His influence had by this time been further increased by the death, in 1232, of the earl of Chester, whose sister, his wife, inherited a vast estate between the Ribble and the Mersey. On his death in 1247, his son William succeeded as 5th earl, and inherited through his wife her share of the great possessions of the Marshals, earls of Pembroke. ”
