The diary surfaced through a book by Dr. Raymond Bernard, who never explained how he obtained Byrd's writings. Bernard was Walter Siegmeister, a dietitian with fringe theories of his own. The content fails on arithmetic: Byrd's polar flight was May 9, 1926, and Operation Highjump, 1946 to 1947, went to the South Pole, not the North. Byrd never mentioned any inner world while alive. The diary appeared after his death. Ohio State's Byrd archive, which holds his real papers, treats the genre as a questionable theory.
The legend persists because Byrd is the perfect protagonist: a real explorer, a real 1926 flight with real data disputes, a real massive 1947 Antarctic operation with classified edges. The hoax welded fiction onto genuine uncertainty, the oil-leak controversy of 1926 lending the whole thing a whiff of suppressed truth. Even the debunkings feed it: the more officials explain Highjump, the more the story reads like a cover for the flight nobody recorded.
The claim: posthumous attribution is the hollow earth genre's core technology, Emerson's Jansen, Saint-Yves's posthumous book, the Byrd diary, because the underground must be reachable only by those who can no longer be asked for directions. Verdict: the pattern is real across the whole wing. The inner earth is the one frontier whose explorers never come home to answer follow-ups. Absence is the passport.
If the proof was published after the witness died, who is testifying?