After Yermolov’s dismissal, Catherine followed her pattern of replacing a nonentity with a seeming paragon, someone she believed was another Lanskoy. Alexander Mamonov, then twenty-six, was another Guards officer, handsome, educated, fluent in French and Italian, and the nephew of the generous Count Stroganov, whose young wife had run off with Rimsky-Korsakov. Only one evening after Yermolov’s dismissal, Mamonov escorted Catherine to her apartment. “They slept until nine o’clock,” Catherine’s secretary wrote in his notebook the following morning. The new favorite was immediately promoted to high rank in the Preobrazhensky Guards and in May 1788 was elevated to the rank of lieutenant general. Later that month, Catherine made him a count. Her private name for him was “L’habit rouge” (the Red Coat), after the color of his favorite uniform. Because he was more intelligent than most of his predecessors, she occasionally asked his advice on political matters. Although she treated him seriously to his face, she spoke of him to others as a doting mother might speak of her child: “We are as clever as the very devil; we adore music; we hide our fondness for poetry as though it were a crime,” she wrote to Grimm. To Potemkin, she reported enthusiastically: “Sasha is beyond price … an inexhaustible source of gaiety, original in his outlook and exceptionally well-informed.… Our whole tone is that of the best society. We write Russian and French to perfection; our features are very regular; we have two black eyes and eyebrows, and a noble, easy bearing.”
Despite Catherine’s initial enthusiasm, her relationship with Mamonov began to cool after eighteen months. By January 1788, the favorite was showing signs of weariness, and there were rumors that he was attempting to evade his intimate duties. In fact, Mamonov found the restrictions involved in life with Catherine burdensome. In St. Petersburg, he was rarely permitted out of her sight, and he hated trips outside the capital, when he was shut up for days on a boat or in a coach; he complained that he found traveling in her coach “stifling.”
In the spring of 1788, he began a clandestine affair with twenty-five-year-old Princess Darya Scherbatova. Soon he was writing to Potemkin, begging to be released from his relationship with Catherine. Potemkin replied sternly, “It is your duty to remain at your post. Don’t be a fool and ruin your career.” By December 1788, Mamonov was in a state of decline, warning that he could no longer perform. Nevertheless, at the beginning of 1789, he was still the official favorite, and Catherine remained deaf to any suggestions that he be replaced. Then, on the evening of February 11, 1789, they quarreled, he asked to resign, and she wept all the next day. Potemkin briefly patched things up, but Mamonov confided to a friend that he considered his life “a prison.” On February 21, Catherine tearfully complained that Mamonov was “cold and preoccupied.” In the weeks that followed, the empress saw him infrequently; on April 21, 1789, her sixtieth birthday, she passed the day in seclusion. By then, Mamonov’s affair with Scherbatova was known to many at court, although still not to Catherine. On June 1, Peter Zavadovsky, the former favorite, was told that Mamonov was determined to marry Scherbatova, whom he described as “a girl most ordinary, not possessing either looks or other gifts.” On June 18, Mamonov finally came to the empress to confess. Beginning his argument with duplicity, he complained that she was cold to him and asked her advice as to what he should do. She understood that he was asking to be released, but, in order to keep him at court, she suggested that he marry Countess Bruce’s thirteen-year-old daughter, one of the richest heiresses in Russia. Catherine was surprised when he declined—and then suddenly the whole truth came out. Trembling, Mamonov admitted that for a year he had been in love with Scherbatova, and that six months earlier, he had given his word to marry her. Catherine was shocked, but she was too proud not to be magnanimous. She summoned Mamonov and Scherbatova and saw immediately that the young woman was pregnant. She pardoned Mamonov and granted the couple permission to marry, even insisting that the ceremony be performed in the palace chapel. She did not attend, but gave them a hundred thousand rubles and a country estate. “God grant them happiness,” she said, stipulating only that they leave St. Petersburg.
She had been generous, but behind her generosity was a woman badly hurt. “I cannot express how I have suffered,” she wrote to Potemkin. “Can you imagine?” He was guilty of “a thousand contradictions and contradictory ideas and irrational behavior.” That anyone should think she had kept him against his will made her indignant. “I have never been anybody’s tyrant and I hate constraint,” she said.