Thérèse, residing in damp obscurity, in gloomy, crushing silence, saw life expand before her in all its nakedness, each night bringing the same cold … - Émile Zola

The truth, first of all, about Dreyfus' trial and conviction: At the root of it all is one evil man, Lt. Colonel du Paty de Clam, who was at the time a mere Major. He is the entire Dreyfus case, and the entirety of it will only come to light when an honest enquiry firmly establishes his actions and responsibilities. ... Nobody would ever believe the experiments to which he subjected the unfortunate Dreyfus, the traps he set for him, the wild investigations, the monstrous fantasies, the whole demented torture. Ah, that first trial! What a nightmare it is for all who know it in its true details. Major du Paty de Clam had Dreyfus arrested and placed in solitary confinement. He ran to Mme Dreyfus, terrorised her, telling her that, if she talked, that was it for her husband. Meanwhile, the unfortunate Dreyfus was tearing his hair out and proclaiming his innocence.

He [Eugène Rougon] believed exclusively in himself; where another saw reasons, Rougon possessed convictions; he subordinated everything to the incessant aggrandisement of his own ego. Despite being utterly devoid of real self-indulgence, he nevertheless indulged in secret orgies of supreme power.

When younger, he had been fun-loving to the point of tedium.