migration and an english mythology.
Like those buried in the ancient mounds that Traffic sang of, Tom Bombadil might be in England but he is not of it. This is signaled in the sequel by the geography of Middle-earth. In their journey from the hobbit-hole of Bag-end to the house of Tom Bombadil the hobbits cross to the other side of the Shire, pass over the Brandywine river, its original border, continue through Buckland, a colony of the Shire where folk are queer, and enter the Old Forest, the point of contact with Faërie. This is a journey into – and beyond – the march, and the lesson, surely, is that once upon a time all of England was the march and the aboriginal spirit of Tolkien’s England is not English.
https://www.intellectualhistory.net/past-meets-present-archive/on-tom-bombadil