The Clarendon State Papers cover the whole period of the Civil War, the Commonwealth and the Restoration until Clarendon's impeachment in 1667. They are supplemented by many volumes in the hand of the 1st Earl, and by papers of the Henry Hyde, 2nd Earl of Clarendon (1638-1709), Edward Hyde, 3rd Earl of Clarendon (1661-1723) and Henry Hyde, 2nd Earl of Rochester and 4th Earl of Clarendon (1672-1753) and of Henry Hyde, Viscount Cornbury (1710-1753). The series is of great value for the historian of the 17th century. The collection includes:
- The chronological series of Clarendon State Papers, dealing chiefly with English history from 1608 to 1689, with a few earlier and later
- Correspondence and papers connected with Sir George Downing's diplomatic position at The Hague from 1661 to 1665
- The manuscript of Clarendon's History of the Rebellion (in seven volumes) from which the first edition was printed in 1702-4 at Oxford