This chapter from a history of the Isle of Man revestment provides a detailed narrative of the 1765 sale of sovereignty from the Duke of Atholl to the Crown. It covers James, 2nd Duke of Atholl's negotiations with George Grenville's Ministry, the statutory framework (Act of Revestment and Mischief Act), and subsequent claims by the 4th Duke for increased compensation (1781-1805). The chapter examines constitutional questions of Parliamentary sovereignty, revenue valuation disputes, and the impact on Manx independence.