At last comes "Le Docteur Pascal" (XX), the zealous scientist who sits in judgment on his family. You see him among his documents, sifting evidence, explaining the heredity of one and another relative, expounding the whole theory of atavism which underlies Zola's series. The old ancestress, Adélaïde Fouque, is still alive, a centenarian, mad, confined for many years in a lunatic asylum. Her son, Antoine Macquart, also survives, still an unscrupulous knave and a confirmed drunkard, until spontaneous combustion destroys him, while hemorrhage carries off little Charles, the last delicate, degenerate scion of the exhausted stock. Pascal himself would seem to have escaped the hereditary taint; but after a long life of celibacy, spent in the study and practice of medicine, his passions awaken, and he falls in love with Clotilde, his niece. He strives to overcome that passion, he wishes to marry the girl to his friend Ramond, but she will not have it so, and in her turn becomes a temptress. Then the impetuous blood of the Rougons masters them both, and they fall into each other's arms. Previously, old Madame Félicité, Pascal's mother, has tried to use Clotilde as an instrument to effect the destruction of the documents which the doctor has collected, for the family would be dishonoured should they ever see the light. The girl has also tried to convert Pascal to her own religious views; but all in vain. A period of delirious folly ensues, Pascal turns prodigal in his old age, and is at last brought to ruin by a dishonest notary. Then Clotilde and he have to part, and he dies, struck down by heart disease. The young woman survives with a child, his son and hers, who, perhaps, may yet rejuvenate the dwindling race. And we see her nursing her babe and indulging in a thousand hopes, as the curtain at last descends on the history of the Rougon-Macquarts.[2]