Something in the Archives?!? (Small spoiler.)

[Googolplex]

In the Archieves are two Grunts you can see, but they did not attack you.
They are only for an illusion to scare you.

But there are a lot of more Grunts.
If you picked up the winecellar-key, you will hear someone. That is not only a sound. But they were automatically removed after a few seconds. There is no chance to see them.