Donald Wayne Foster raised arguments challenging whether the person traditionally identified as the author of a text was correct. He has pointed to an obscure Beat writer, Tom Hawkins, as the author of the Wanda Tinasky letters, which some had previously speculated to be the work of Thomas Pynchon. Foster also joined a long-running effort by descendants of Henry Livingston Jr. to show that their ancestor, and not Clement Clarke Moore, wrote the famous poem "A Visit from St. Nicholas". Foster provided his account of sleuthing out these and other identifications in his book "Author Unknown" (including the Shakespeare-"Elegy" connection, which he still
A Visit from St. Nicholas family lore gives credit to their forebear rather than Moore, but there is no proof that Livingston himself ever claimed authorship, nor has any record ever been found of any printing of the poem with Livingston's name attached to it, despite more than 40 years of searches. Advocates for Livingston's authorship argue that Moore "tried at first to disavow" the poem. They also posit that Moore falsely claimed to have translated a book. Document dealer and historian Seth Kaller has challenged both claims. Kaller examined the book in question, "A Complete Treatise on Merinos and Other Sheep", as well as