intended and actual recipient of Petworth, Cockermouth Castle and Egremont Castle. Following the 7th Duke's death in 1750, his lands and titles were split between his daughter, Lady Elizabeth Seymour and her husband Sir Hugh Smithson, 4th Baronet (d.1786), and Charles Wyndham through the 7th Duke's deceased brother-in-law Sir William Wyndham. The former inherited the northern Percy estates, including Alnwick Castle and Syon House, together with the titles Baron Warkworth of Warkworth Castle and Earl of Northumberland and whose descendants are the current Dukes of Northumberland based at Alnwick Castle. The latter inherited Petworth and some estates in Sussex, Cumbria and Yorkshire as Earls of Egremont. The 2nd Earl was responsible for the collections of Rococo mirrors and antique statues that exist in the house today and was responsible for commissioning Lancelot 'Capability' Brown to landscape the parkland during the 1750s and 1760s. The works involved the demolition of the formal gardens that preceded it, the landscaping of the wider parkland to raise the profile of the lawn in front of the house, infill quarries, smooth over the terraced walks and digging out buildings in the parkland down to foundation level. Archaeological investigations seemed to suggest that the turf was removed prior to the levelling works so they could be replaced after the works were completed and aiding the current natural look to the landscape. House of Art It was the 3rd Earl of Egremont, George O'Brien Wyndham (1751-1837) who solidified the house's reputation as one of fine art. He inherited the house in 1763 and began what has been termed a 'Golden Age' of Petworth when he expanded his collection of contemporary art and expanded and changed the house in order to display it best, in particular through the addition of the North Gallery in 1824–5. He was patron to many contemporary artists including J. M. W. Turner and John Constable who were frequent guests to the house and painted the house and its parkland frequently - this has more recently helped inform restorations to the house and parkland. The 3rd Earl bequeathed Petworth and Cockermouth Castle to his illegitimate son and adopted heir Col. George Wyndham (1787-1869), but who could not inherit the title of Earl of Egremont so was instead created Baron Leconfield by Queen Victoria in 1859. The title of Earl of Egremont instead passed to his nephew George Wyndham, 4th Earl of Egremont (1786-1845) who,