"I would ask you to come with me to the concierge immediately."

"You think of such a thing!" he exclaimed.

Since the evening when he had testified to the death of Caffie, he had
not returned to the Rue Sainte-Anne; and it was not when the description
given by Madame Dammauville was, doubtless, already spread in the
quarter, that he was going to commit the imprudence of showing himself.
But he must explain this exclamation.

"How can you expect a doctor to give himself up to such an investigation?
On your part it is quite natural; on mine it would be unheard of and
ridiculous; add that it would be dangerous. You must conciliate Madame
Dammauville, and this would be truly a stupidity that would give her a
pretext for thinking that you are trying to find out whether she is, or
is not, in her right mind."

"That is true," she said. "I had not thought of that. I said to myself
that, while I could only listen to what the concierge would tell me, you
would know how to question her in a way that would lead her to say what
you want to learn."

"I hope that your investigation will tell me. In any case, let us offend
in nothing. If to-morrow you bring me only insignificant details, we
will consider what to do. In the mean time, return to the concierge this
evening and question her. If it is possible, see Madame Dammauville, and
do not go home until after having obtained some news on this subject that
is of such importance to us. And I will go to see Nougarde."