Sasha worked in Artefact Storage, so it's likely that she was already familiar with Leitners and other items, more so than Jon, who in Research probably only got to see selected cases. And maybe she'd have started looking into Gertrude sooner, which would also have made it likelier that she'd discover clues.

Yes! I want to know what "everyday life" is like in the nightmare kingdom. (And what the taxes look like.)