But the eager public declared that the pictures and furniture could not vanish like so many ghosts. They are substantial, material things and require doors and windows for their exits and their entrances, and so do the people that remove them. Who were those people? How did they gain access to the castle? And how did they leave it?

The police officers of Rouen, convinced of their own impotence, solicited the assistance of the Parisian detective force. Mon. Dudouis, chief of the Sûreté, sent the best sleuths of the iron brigade. He himself spent forty-eight hours at the castle, but met with no success. Then he sent for Ganimard, whose past services had proved so useful when all else failed.

Ganimard listened, in silence, to the instructions of his superior; then, shaking his head, he said:

“In my opinion, it is useless to ransack the castle. The solution of the problem lies elsewhere.”