User blog comment:Nekokokokoko/Slane Theocracy's awareness of Ainz/@comment-26501532-20150920141320/@comment-26932361-20150924015021

The reason why they didn't know at the very beginning is because of what I said in my previous comment before, which is that they sent the black scripture immediately right after their magic was countered, so at that time the knights probably haven't even returned yet, that's why they didn't know at that time what exactly happened as evident since the whole Shalltear incident happened just few days after Ainz met the Sunlight Scripture, however I was talking about how later on they should find out about it, which by the time of the sixth volume when Jircniv gets that information; it was weeks or months after the incident, so they well had more than enough time to figure and find out what happened by then.