sixteenth century its chief opponents were Socinus, Blandrata, and the Fratres Poloni; its defenders, Ley, Beza, Bellarmine, and Sixtus Senensis." In the 17th century John Selden in Latin and Francis Cheynell and Henry Hammond were English writers with studies on the verse, Johann Gerhard and Abraham Calovius from the German Lutherans, writing in Latin. Simon, Newton, Mill and Bengel The 2nd dispute stage begins with Sandius, the Arian around 1670. Francis Turretin published De Tribus Testibus Coelestibus in 1674 and the verse was a central focus of the writings of Symon Patrick. In 1689 the attack on authenticity by Richard Simon was published in English, in his Critical History of the Text of the New Testament. Many responded directly to the views of Simon, including Thomas Smith, Friedrich Kettner, James Benigne Bossuet, Johann Majus, Thomas Ittigius, Abraham Taylor and the published sermons of Edmund Calamy. There was the verse defences by John Mill and later by Johann Bengel. Also in this era was the David Martin and Thomas Emlyn debate. There were attacks on authenticity by Richard Bentley and Samuel Clarke and William Whiston and defence of authenticity by John Guyse in the Practical Expositor. There were writings by numerous additional scholars, including posthumous publication in London of Isaac Newton's Two Letters in 1754 (An Historical Account of Two Notable Corruptions of Scripture), which he had written to John Locke in 1690. The mariner's compass poem of Bengel was given in a slightly modified form by John Wesley. Travis and Porson debate The third stage of the controversy begins with the quote from Edward Gibbon in 1776: Even the Scriptures themselves were profaned by their rash and sacrilegious hands. The memorable text, which asserts the unity of the three who bear witness in heaven, is condemned by the universal silence of the orthodox fathers, ancient versions, and authentic manuscripts. It was first alleged by the Catholic bishops whom Hunneric summoned to the conference of Carthage. An allegorical interpretation, in the form, perhaps, of a marginal note, invaded the text of the Latin Bibles, which were renewed and corrected in a dark period of ten centuries. It is followed by the response of George Travis that led to the Porson–Travis debate. In the 1794 3rd edition of Letters to Edward Gibbon, Travis included a 42-part appendix with source references. Another event coincided with the inauguration of this stage of the debate: