50% cotton: authorship, authority, and the Atlantic -- A key for the gate : Roger Williams, parliament, & Providence -- "A belcher-out of errours": Samuel Gorton and the Atlantic subject -- Antinomians, Anabaptists, and Aquidneck: contesting heresy in interregnum London -- Suffering and subscribing: configurations of authorship in the Quaker Atlantic -- Conclusion: "a lively experiment.