While making his preparations after this interview, Alfred Boyer could not shake off an impression, that, vague as it was and without foundation, seemed to him a certainty. This visit to his sister-in-law was costing the Prince very dear. There was a mystery in their relations, and a very painful one. Whence came this rupture, and what were its causes, so profound that not the slightest mention of a Duchess d'Ivrea had ever been made either by the Prince or by any of his five daughters? Not one of them bore this name; they were called simply the Frédets of Augsbourg. What had happened between the two brothers? Had this rupture preceded the marriage? Or had that event been the cause of it? All these questions presented themselves to the young man's mind without his having the faintest inkling as to their solution. During the long months of his sojourn he had not established relations with any one among the few country families in the neighborhood of Combes. Moreover, he would have considered himself unworthy of the confidence that his patron had shown him from the very first, opening his archives to him, letting him live in complete intimacy with his household, if he had made any inquiries about the Frédets. From the moment that there was a question of some family secret, to start a conversation on this subject with the old relative who acted as housekeeper would have been as impossible as to try and make one of the young girls talk about it. He knew no more of the affair when the day after the conversation the Prince and he arrived in Paris than he did on the preceding evening. During the journey he had noted the increasing preoccupation of his companion, who, when they reached the station, said to him: "I do not know as yet where we shall put up. Let us take a cab and we will stop at some lodging-house. I used to know a place in the Rue de Bourgogne, in the neighborhood of the Chamber of Deputies. We will be near the Rue de Grenelle, where our business is. The d'Ivrea house is the same that the marshal lived in under the Empire." "Next door to the house of the Duc de Feltré?" returned Alfred Boyer. "It was only three days ago that I was transcribing the page on which he relates their meeting on the sidewalk in front of their houses on his return from Waterloo, and his refusal to return the Duc's salutation. How finely the passage concludes: 'Perhaps it was not just,' he writes, 'but at that time every French officer who had not fought at Waterloo filled me with horror. I should add that if the Duc de Feltré deserted us, at least it was not, as in so many other cases, for money. He was my friend, and I attest that I have always known him to be an upright man with clean hands.'