A detailed historical chapter examining the immediate and long-term effects of the 1765 Revestment on Isle of Man governance. It covers the shift from hereditary lords to Treasury control, the contentious relationship between the 4th Duke of Atholl and the Tynwald Court (1793–1826), parliamentary disputes over compensation, and the eventual Crown purchase of the duke's remaining rights. The chapter includes extensive discussion of constitutional tensions, revenue disputes, and the comparative prosperity of the island under different regimes.