Bards use their mouths or instruments. Famke is solely verbal. If he heard Famke, then he could put two and two together. "She said she would be gone and she was!" Probably more damning evidence than hand waivery.
Bastille not the Bastard cures the bard's disease, not a spell. It is 5 points of Lay Hands. Then requests everyone to be inspected, for all our safety. "Percy, come help please. I'm low on power."
Bastille word banters with the bard and gets his update on the rest of the city. Are the docks overrun? He will also purify food and drink, making the supplies go...