After the lack of such tools during the first war, she overprepared a bit on this one. Added to the fact that she didn't have to use a lot during the war since it was their home base, she still had a few in her space.
They also took a few servants, especially the older-looking ones, and made them drink the truth potion. Sadly, they knew no more than the guard they killed.
They did it repeatedly in many places and fortunately, the slaves and servants left weren't particularly strong. Basically, while they sauntered across the lord's house, they were relatively undisturbed.
As they perused the rooms, most of which were empty, Althea also low-key stole some interesting items like unique decorations and cheap tools. Nothing too valuable, but since it was there might as well take it. Maybe… magically the token was hidden in them, anyway.
(Of course, even Althea was not that lucky).