Who wrote “A Visit from St. Nicholas”?

The poem “A Visit from St. Nicholas” was published anonymously in 1823. The scholar and teacher Clement Clarke Moore later claimed authorship when he included it in his collection Poems (1844). By his own account, he had written it for the enjoyment of his children for Christmas in 1822. After Moore’s Poems was published, the family of Henry Livingston, Jr. (a soldier, landowner, and poet who died in 1828) disputed Moore’s claim and argued that the poem was Livingston’s. In the early 21st century, computer-aided analysis of the text indicated that the poem shows more similarities to Livingston’s poetry than to Moore’s.