An Attempt to Prove, that Every Species of Patronage is Foreign to the Nature of the Church;: And that Any Modifications, which Either Have Been, Or Ever Can be Proposed, are Insufficient to Regain, and Secure Her in the Possession of the Liberty, Wherewith Christ Hath Made Her Free. In Six Dissertations. With an Introduction, Wherein the Unhappy Condition, to which the Church of Scotland is Reduced, by the Present Ecclesiastic Management, is Represented as the Reason of the Present Undertaking: and a Conclusion, Wherein the Only Method Left for Reformation is Proposed, and Recommended to the Friends of Christian Liberty