“And as I have already said, everything is here. You see in direct heredity, the differentiations, that of the mother, Silvère, Lisa, Désirée, Jacques, Louiset, yourself; that of the father, Sidonie, François, Gervaise, Octave, Jacques, Louis. Then there are the three cases of crossing: by conjugation, Ursule, Aristide, Anna, Victor; by dissemination, Maxime, Serge, Étienne; by fusion, Antoine, Eugène, Claude. I even noted a fourth case, a very remarkable one, an even cross, Pierre and Pauline; and varieties are established, the differentiation of the mother, for example, often accords with the physical resemblance of the father; or, it is the contrary which takes place, so that, in the crossing, the physical and mental predominance remains with one parent or the other, according to circumstances. Then here is indirect heredity, that of the collateral branches. I have but one well established example of this, the striking personal resemblance of Octave Mouret to his uncle Eugène Rougon. I have also but one example of transmission by influence, Anna, the daughter of Gervaise and Coupeau, who bore a striking resemblance, especially in her childhood, to Lantier, her mother’s first lover. But what I am very rich in is in examples of reversion to the original stock—the three finest cases, Marthe, Jeanne, and Charles, resembling Aunt Dide; the resemblance thus passing over one, two, and three generations. This is certainly exceptional, for I scarcely believe in atavism; it seems to me that the new elements brought by the partners, accidents, and the infinite variety of crossings must rapidly efface particular characteristics, so as to bring back the individual to the general type. And there remains variation—Hélène, Jean, Angelique. This is the combination, the chemical mixture in which the physical and mental characteristics of the parents are blended, without any of their traits seeming to reappear in the new being.” There was silence for a moment. Clotilde had listened to him with profound attention, wishing to understand. And he remained absorbed in thought, his eyes still fixed on the tree, in the desire to judge his work impartially. He then continued in a low tone, as if speaking to himself: