Clement Clarke Moore test that Livingston was the more likely author. General A Visit from St. Nicholas Clement Clarke Moore Clement Clarke Moore (July 15, 1779 – July 10, 1863) was a writer and American Professor of Oriental and Greek Literature, as well as Divinity and Biblical Learning, at the General Theological Seminary of the Protestant Episcopal Church, in New York City. The seminary was developed on land donated by Moore and it continues on this site at Ninth Avenue between 20th and 21st streets, in an area known as Chelsea Square. Moore's connection with the seminary continued for more than 25 years.
A Visit from St. Nicholas many letters signed by Moore, and found that the "signature" was not penned by Moore, and thus provides no evidence that Moore made any plagiaristic claim. Kaller's findings were confirmed by autograph expert James Lowe, by Dr. Joe Nickell, the author of "Pen, Ink & Evidence," and by others. According to Kaller, Moore's name was likely written on the book by a New-York Historical Society cataloger to indicate that it had been a gift from Moore to the Society. The following points have been advanced in order to credit the poem to Major Henry Livingston Jr.: Livingston also wrote poetry