When Edward Sackville died in 1652, his son Richard inherited not only the earldom, but estates in substantial debt, not least owing to fines imposed by Parliament for his father's role in the Civil War. He practised quiet retrenchment, despite taking part in some public work following the Restoration of Charles II, including membership of the commission for the trial of the regicides. However, his marriage to Lady Frances Cranfield, daughter of Lionel Cranfield, was important for Knole. When her brother died, she inherited the Middlesex estates, including Copt Hall in Essex. Richard died at Knole on 27 August 1677. but his son, Charles, the sixth earl of Dorset (1643–1706), sold Copt Hall in 1701. Many of the contents were then moved to Knole, substantially enriching the collection. These include the copies by Daniel Mytens of Raphael cartoons in the Cartoon Gallery and many portraits and pieces of furniture. Along with John Frederick Sackville, the third duke of Dorset (1745–1799), Charles can now be seen as one of the two principal collectors responsible for the remarkable holdings of Knole House.