A Visit from St. Nicholas concludes that Livingston is the true author of the classic work. Notes Further reading A Visit from St. Nicholas "A Visit from St. Nicholas", more commonly known as "The Night Before Christmas" and "Twas the Night Before Christmas" from its first line, is a poem first published anonymously in 1823 and later attributed to Clement Clarke Moore, who claimed authorship in 1837. Some commentators now believe the poem was written by Henry Livingston Jr.. The poem has been called "arguably the best-known verses ever written by an American" and is largely responsible for some of the conceptions of Santa Claus
Elegy Written in a Country Churchyard “The Magdalens: an elegy” (1763); “The Nun: an elegy” (1764); and “An Elegy Written Among the Ruins of an Abbey” (1765), which is derivative of the earlier poems on ruins by Moore and Cunningham. At the opposite extreme, Gray's poem provided a format for a surprising number that purport to be personal descriptions of life in gaol, starting with “An elegy in imitation of Gray, written in the King's Bench Prison by a minor “ (London 1790), which is close in title to William Thomas Moncrieff’s later "Prison Thoughts: An elegy, written in the King's Bench Prison", dating from 1816