Bilbo´s treachery

[Ivriniel]

...put a lid on the monolithic assumption that 'first publication' [of The Hobbit] means the same thing as 'first conceived' as a Ring [in the absolutist sense, as NOT BEFORE December of 1937]...

...And I add, that the donging-on-the-head of the --assumption-- does NOT preclude the.....

Competing one - yours - about content, not timing.