Maester Steven, “something really bad happened that caused a massive break in historiographical continuity. . ” could you please explain what this means (not my first language) Thanks

Well, with a persistent institution like the Citadel, one would expect continuity of records, albeit with some transcription errors over time, some losses of original documents due to physical degredation or minor fires, etc. But the complete loss of pre-Andal records would take something akin to the burning of the Library of Alexandria…

Or some sort of deliberate destruction or hiding of evidence, a la Umberto Eco’s In the Name of the Rose…