This is a working editorial/research document compiled during manuscript development, not a primary historical source. It documents planning discussions for Part IV of a book on the 1765 Isle of Man Revestment, including chapter outlines, primary source identification needs, and synthesis of evidence already gathered from Parts I–III. The document traces evidence of parliamentary retrospective admissions (1790–1829) regarding the coercive nature and legal questionability of the 1765 transaction.