1689 - Sir John Fenwick sold his estate to Sir William Blackett of Wallington, Northumberland. who was the third son of Sir William Blackett of Newcastle, Merchant. He also served as a local MP.
1705 - On the death of his father, William Blackett succeeded to the estate.
1728 Walter Calverley son of Walter Calverley of Elshot Yorkshire, and nephew of William Blackett succeeded to the estate with the proviso that he married William's illegitimate daughter Elizabeth Ord and adopt the surname Blackett, there were however no surviving children of the marriage
1777 - the estate passed to the Wentworth family of Bretton Hall Yorkshire
1792 on the death of Sir Thomas Wentworth the estate was left to the illegitimate daughter of Sir Thomas, Diana, wife of Colonel Richard Beaumont
1832 - The estate passed to Sir Thomas Wentworth Blackett, son of Diana.
1848 The estate passed to Wentworth Blackett Beaumont and it continues with that family
1906 Created First Baron Allendale
1911 Created Viscount Allendale (Wentworth Canning Blackett Beaumont 1860-1923)