Official report by Commissioners of Inquiry examining four major allegations by the Duke of Atholl regarding the 1765 Revestment Act: (1) the Duke's family's power to increase duties; (2) rights deemed necessary for revenue security; (3) rights rendered nugatory by the Act; and (4) laws passed affecting his interests without notice. The report includes detailed analysis of specific rights (herring customs, fisheries, harbours, game, waste lands, boons and services) and systemic deficiencies in the Isle of Man Revenue Department.