“In the meantime, I should go in search of this friend of M. de Boiscoran’s, this Englishman, whose name he assumed; and the London police would aid me in my efforts.  If that Englishman is dead, we would hear of it, and it would be a misfortune.  If he is only at the other end of the world, the transatlantic cable enables us to question him, and to be answered in a week.

“I should, at the same time, have sent detectives after that English maid-servant who attended to the house in Vine Street.  M. de Boiscoran declares that she has never even caught a glimpse of the countess.  I do not believe it.  It is out of question that a servant should not wish for the means, and find them, of seeing the face of the woman who comes to see her master.

“And that is not all.  There were other people who came to the house in Vine Street.  I should examine them one by one,—­the gardener and his help, the water-carrier, the upholsterer, the errand-boys of all the merchants.  Who can say whether one of them is not in possession of this truth which we are seeking?

“Finally, when a woman has spent so many days in a house, it is almost impossible that she should not have left some traces of her passage behind her.  Since then, you will say, there has been the war, and then the commune.  Nevertheless, I should examine the ruins, every tree in the garden, every pane in the windows:  I should compel the very mirrors that have escaped destruction to give me back the image which they have so often reflected.”

“Ah, I call that speaking!” cried the doctor, full of enthusiasm.

The others trembled with excitement.  They felt that the struggle was commencing.  But, unmindful of the impression he had produced, M. Folgat went on,—­

“Here in Sauveterre, the task would be more difficult; but, in case of success, the result, also, would be more decided.  I should bring down from Paris one of those keen, subtle detectives who have made an art of their profession, and I should know how to stimulate his vanity.  He, of course, would have to know every thing, even the names; but there would be no danger in that.  His desire to succeed, the splendor of the reward, even his professional habits, would be our security.  He would come down secretly, concealed under whatever disguise would appear to him most useful for his purpose; and he would begin once more, for the benefit of the defence, the investigation carried on by M. Galpin for the benefit of the prosecution.  Would he find out any thing?  We can but hope so.  I know detectives, who, by the aid of smaller material, have unravelled far deeper mysteries.”

Grandpapa Chandore, excellent M. Seneschal, Dr. Seignebos, and even M. Magloire, were literally drinking in the words of the Paris lawyer.

“Is that all, gentlemen?” he continued.  “By no means!  Thanks to his great experience, Dr. Seignebos had, on the very first day, instinctively guessed who was the most important personage of this mysterious drama.”