Meanwhile, at the palace:
The group have found some evidence that the steward is probably part of the plot, including bottles that might contain the poison used on the Graf (these need to be tested). The current steward was hired suddenly to replace the old one, who 'retired' at short notice. The order appointing the steward (who was hired from outside the household, unusually) came from someone in the Chancellor's office (Erich Kalzbad).
Klaus is talking to the steward at the moment.
So, what next?