A legal opinion from the Duke of Atholl's officials (Castle Rushen) addressing the naturalization and trading privileges of four Roman Catholic merchants (Arthur, Folie, Connor, Dean) in the Isle of Man. The document outlines Manx sovereignty, native privileges, the Lord's prerogative to naturalize foreigners, and argues that naturalization concerns secular justice and trade equality, not religious conformity. It affirms the Isle's Protestant establishment and notes the absence of penal statutes against Catholics.