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'''Aerigulus{{PAGENAME}}''' was an [[Ultramarines]] [[Librarian]]{{Fn|1a}} in [[M37]]{{Fn|1b}} and was part of his [[Chapter]]'s forces sent to take part in the successful [[Cleansing of Danor IV]]. The [[Crimson Sabres]] were among the six Chapters who took part in the Cleansing, and Aerigulus noted in his report afterwards that he was concerned for their constant need to seek acceptance from the other Chapters involved in the campaign, but this overzealousness might be expected from a new Chapter that fought alongside more stalwart ones. When the Crimson Sabres were later declared [[Excommunicate Traitoris]] by the [[Imperium]] in [[M41]], the [[Inquisition]] began an investigation into the Chapter, and Aerigulus's report was among the few records discovered that detailed Crimson Sabres' early history.{{Fn|1a}}

==SourceSee Also=====Related Articles===*[[List of Librarians]] ==Sources==