
[O]n one occasion I interrupted: 'Last time, you said Bilbo's front door was blue, and you said Thorin had a golden tassel on his hood, but you've just said that Bilbo's front door was green and that Thorin's hood was silver'; at which point my father muttered 'Damn the boy,' and then 'strode across the room' to his desk to make a note.
Christopher Tolkien, foreword to The Hobbit
Is this perhaps pertaining to the anecdote by Christopher Tolkien in the 50th anniversary edition of the Hobbit?