“And where was he killed?”

“In the Square Tower.”

We all sprang to our feet at this declaration in the greatest agitation. M. and Mme. Rance seemed completely stupefied by the words which they had heard and M. and Mme. Darzac and myself were plunged into the most profound agitation by the fact that Rouletabille had not hesitated to reveal the secret.

“In the Square Tower?” cried Mme. Edith. “And who, then, has killed him?”

“M. Robert Darzac,” replied Rouletabille. “And he entreats everyone to sit down.”

It was astonishing how we seated ourselves with one accord, as though, at such a moment, we had nothing to do except to obey this youngster. But almost immediately Mme. Edith arose and seizing M. Darzac by the hand, she exclaimed with an emphasis which made me decide that I had judged her wrongly when I called her affected:

“Bravo, Monsieur Robert! All right! You are a gentleman!”

Then she paid some exaggerated compliments—for after all, it was her nature to exaggerate things—to Mme. Darzac. She swore eternal friendship for her; she declared that she and her husband were ready, under all circumstances, to stand by the Darzacs and that the latter might count upon their zeal and their devotion and that they would swear whatever one liked before all the judges in the tribunal.

“Gently, dear Madame,” interrupted Rouletabille. “There is no question of judges and we hope that there may not be. There’s no need of it. Larsan was a dead man in the eyes of the whole world long before he was killed last night—he will continue to be dead, that is all! We have decided that it would be useless to reopen a scandal of which M. and Mme. Darzac have already been made the innocent victims and we have counted upon your assistance. The affair has happened in so mysterious a fashion that even you, if we had not informed you in regard to it, would never have suspected. But M. and Mme. Darzac are endowed with sentiments too noble to permit them to forget what they owe to their hosts. The most simple rules of hospitality ordered them to tell you that they killed a man in your house last night. How foolish it would be to lay bare this unfortunate story to some Italian police officer and subject you to the inconvenience of having your names coupled with the miserable business, and, it might easily be, to have a search made of your house and hired servants of the law under your roof! M. and Mme. Darzac, for your sakes alone, are anxious that you should not run the risk of being the object of idle gossip, or, perhaps, of having the police descend upon your home.”

M. Arthur Rance, who up to this time had remained speechless, arose and said, his face as pallid as though he had seen a ghost: