Moreover, though he never displayed any repugnance to his relatives, he very rarely saw them, following in this wise his natural instincts. Before Aristide obtained a situation at the Sub-Prefecture, Pascal had frequently come to his assistance. For his part he had remained a bachelor. He had not the least suspicion of the grave events that were preparing. For two or three years he had been studying the great problem of heredity, comparing the human and animal races together, and becoming absorbed in the strange results which he obtained. Certain observations which he had made with respect to himself and his relatives had been, so to say, the starting-point of his studies. The common people, with their natural intuition, so well understood that he was quite different from the other Rougons, that they invariably called him Monsieur Pascal, without ever adding his family name. Three years prior to the Revolution of 1848 Pierre and Félicité retired from business. Old age was coming on apace; they were both past fifty and were weary enough of the struggle. In face of their ill fortune, they were afraid of being ultimately ruined if they obstinately persisted in the fight. Their sons, by disappointing their expectations, had dealt them the final blow. Now that they despaired of ever being enriched by them, they were anxious to make some little provision for old age. They retired with forty thousand francs at the utmost. This sum provided an annual income of two thousand francs, just sufficient to live in a small way in the provinces. Fortunately, they were by themselves, having succeeded in marrying their daughters Marthe and Sidonie, the former of whom resided at Marseilles and the latter in Paris. After they had settled their affairs they would much have liked to take up their abode in the new town, the quarter of the retired traders, but they dared not do so. Their income was too small; they were afraid that they would cut but a poor figure there. So, as a sort of compromise, they took apartments in the Rue de la Banne, the street which separates the old quarter from the new one. As their abode was one of the row of houses bordering the old quarter, they still lived among the common people; nevertheless, they could see the town of the richer classes from their windows, so that they were just on the threshold of the promised land.