The second Earl's eldest son and successor, the third Earl, was known as a patron of art. He also sponsored the Petworth Emigration Scheme, which sent thousands of working-class people from the south of England to Upper Canada between 1832 and 1837. On his death the titles passed to his nephew, the fourth Earl. When he died in 1845 the barony of Cockermouth and earldom of Egremont became extinct. The large Wyndham estates, including Petworth House in Sussex had already passed to Colonel George Wyndham. He was the natural son and adopted heir of the third Earl. In 1859 he was raised to the peerage in his own right as Baron Leconfield. Moreover, in 1963 the Egremont title was revived for his great-great-grandson John Wyndham, who was created Baron Egremont, of Petworth in the County of Sussex. In 1967 he succeeded his father as sixth Baron Leconfield.