The Essential Rights and Liberties of Protestants: A Seasonable Plea for the Liberty of Conscience and the Right of Private Judgment in Matters of Religion, Without Any Controul From Human Authority: Being a Letter From a Gentleman in the Massachusett-Bay to His Friend in Connecticut, Wherein Some Thoughts on the Origin, End, and Extent of the Civil Power, With Some Brief Considerations on Several Late Laws in Connecticut, Are Humbly Offered