Indeed, they detect the potions and the subordinate heads there. The leader doesn't let up his vigil.

Spoiler
Show
you recall the names of three of the caretakers, middle-aged women who seem very brisk and businesslike, but not cruel.

I'll let you fill in the details for their names and such. If I come up with them, I'll never remember them.


You can sneak past them if you wish, but there is no cover in the other half of the room beyond the leader.