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In the Heart of the Oak Grove.
We reached the chateau, and, as we approached it, saw four gendarmes pacing in front of a little door in the ground floor of the donjon.

We soon learned that in this ground floor, which had formerly served as a prison, Monsieur and Madame Bernier, the concierges, were confined.
Monsieur Robert Darzac led us into the modern part of the chateau by a large door, protected by a projecting awning--a "marquise" as it is called.

Rouletabille, who had resigned the horse and the cab to the care of a servant, never took his eyes off Monsieur Darzac.

I followed his look and perceived that it was directed solely towards the gloved hands of the Sorbonne professor.