In 1683, Anglesey appeared at the Old Bailey as a witness in defence of Lord Russell, and in June 1685 he protested alone against the revision of Lord Stafford's attainder. He divided his time between his estate at Blechingdon in Oxfordshire, and his house on Drury Lane in London, where he died in 1686 from quinsy, closing a career marked by great ability, statesmanship and business capacity, and by conspicuous courage and independence of judgement. He amassed a large fortune in Ireland, in which country he had been allotted lands by Cromwell. At his death, his library of books was believed to be the largest English library not in ecclesiastical hands. He was buried at Farnborough, Hampshire.