Robert Calef wrote a book in support of the ongoing Salem Witch Trials and trial supporter, Cotton Mather.
He was the author of , a book composed throughout the mid-1690s denouncing the recent Salem witch trials of 16921693 and particularly examining the influential role played by Cotton Mather. 
Robert Calef, after exchanging letters with Cotton Mather and many other area ministers, published his book More Wonders of the Invisible World, with his title being a riff on Cotton Mather's own introduction to his account of M.Rule "yet more Wonders ..." Calef objected to proceedings that lead to "a Biggotted Zeal, stirring up a Blind and most Bloody rage, not against Enemies, or Irreligious Proffligate Persons, But (in Judgment of Charity, and to view) against as Vertuous and Religious as any they have left behind them in this Country, which have suffered as Evil doers with the utmost extent of rigour." 
