>>719032510
So I did misremember it. Then I got curious and rewatched a video of when you free her in the crypt and she actually flat out tells you she has an Elder Scroll if you ask (I wasn't sure when you learned that tidbit, I thought it was in the vamp castle), but you have zero dialogue option to tell Isran about that unimportant detail if you bring her to him despite being able to point out to him she's a vampire. Isran even has that line about how she must have something the vampires want, yeah lol what could it be lmao.
So he lets her walk away with what you know is an Elder Scroll because you couldn't tell him anything, so you can find out what the vampires want with her, which is the Elder Scroll.
This is even dumber than I remembered.
>>719032551
Pic from the post above yours means the player character knew (not that it was really subtle).