Elder Scrolls draw a blank (literally!) on what happened when the Dragon Broke. Ergo, there is *something* that seems to prevent them from recording the truth. I put my guess on it being 'temporal nonlinearity.'
I don't recall from where that info comes; could have sworn that the Scrolls were Truth, in all and everything. I would agree with Merari, though. During the dragon break, no one had any idea what was happening, and The Historian was a fledgling occupation. Whether or not the years were wrong, or how obsessed Tamriel was with the psychomechanaut godwalker, the dragon break did happen. Maybe it was a Time-thingy, and how appropriate; the dragon was broken afterall.
Maybe as a product of post-convention, there's no comprehensible recording of any Dawn Era, Middle or otherwise. To note though, I might be missing something quite obvious.
On a fun note
Aldermatitis, the holygolden Jaundice! Suffered by the High Elves, rebuked by Dark Elves.