Looks like the last article in Ms. Seth's 28 part investigation of Tom Bombadil is now published:
https://priyasethtolkienfan.wordpres...-last-stage-4/
Once again, the focus is Tolkien's analogy of a 'theatrical play' to his structural set-up of Middle-earth and the world of his legendarium. To this proposal she provides much other evidence. Also in adding to the many guises of Tom, from whom she claims multiple legends and fairy-stories are sourced, is the figure of the Welsh Bard: Taliesin.
Lastly and fittingly, given her many essays linking Bombadil to the greatest of angels, she has managed to show a coherent story by finishing of Tom's connection as the 'audience' of the 'play' to the Archangel Michael from Old English text.