"Ah, but the new-fangled science of this modern age proves otherwise..."
Lepus nods deferentially to Dr. North.
"There be methods of identifying who's touched what. Madam, we knows what thou hast been touching, what sealed chambers thou hast been in, what walls thou hast been passing, what devilish books thou hast been reading...."
If the young heir is present, the wanderer will shift his gaze meaningfully between him and the governess.