It surrendered to Ireton in 1651, and was burned by Sarsfield in 1688.
In May 1647 in company with Skippon, Ireton and Fleetwood, he visited the army, inquired into and reported on the grievances, and endeavoured to persuade them to submit to the parliament."
He was not insensible to Charles's good qualities, was touched by the paternal affection he showed for his children, and is said to have declared that Charles" was the uprightest and most conscientious man of his three kingdoms."The Heads of the Proposals, which, on Charles raising objections, had been modified by the influence of Cromwell and Ireton, demanded the control of the militia and the choice of ministers by parliament for ten years, a religious toleration, and a council of state to which much of the royal control over the army and foreign policy would be delegated.
At the Restoration his body was exhumed, and on the 30th of January 1661, the anniversary of the execution of Charles I., it was drawn on a sledge from Holborn to Tyburn, together with the bodies of Ireton and Bradshaw, accompanied by "the universal outcry and curses of the people."
Of these Bridget was the wife successively of Ireton and Fleetwood, Elizabeth married John Claypole, Mary was wife of Thomas Belasyse, Lord Fauconberg; and Frances was the wife of Sir Robert Rich, and secondly of Sir John Russell.
The castle was more than once besieged in the time of Cromwell, and was taken by Ireton in 1650.
In 1652 he married Cromwell's daughter, Bridget, widow of Ireton, and was made commande in-chief in Ireland, to which title that of lord deputy was added, The chief feature of his administration, which lasted from September 1652 till September 1655, was the settlement of the soldiers on the confiscated estates and the transplantation of the original owners, which he carried out ruthlessly.
In 1651 it was taken by General Ireton, and after an unsuccessful siege by William III.
He was perhaps drawn to the Puritan period by the fact of his descent from Cromwell and Ireton, but he has certainly written of it with no other purpose than to set forth the truth.