Moreau the son, heir to the doctrines and friendships of his father, was concerned in one of the conspiracies which assailed the First Consul on his accession to power.

At this crisis, Monsieur de Serizy, anxious to pay his debt of gratitude, enabled Moreau, lying under sentence of death, to make his escape; in 1804 he asked for his pardon, obtained it, offered him first a place in his government office, and finally took him as private secretary for his own affairs.
Some time after the marriage of his patron Moreau fell in love with the countess's waiting-woman and married her.

To avoid the annoyances of the false position in which this marriage placed him (more than one example of which could be seen at the imperial court), Moreau asked the count to give him the management of the Presles estate, where his wife could play the lady in a country region, and neither of them would be made to suffer from wounded self-love.

The count wanted a trustworthy man at Presles, for his wife preferred Serizy, an estate only fifteen miles from Paris.

For three or four years Moreau had held the key of the count's affairs; he was intelligent, and before the Revolution he had studied law in his father's office; so Monsieur de Serizy granted his request.
"You can never advance in life," he said to Moreau, "for you have broken your neck; but you can be happy, and I will take care that you are so." He gave Moreau a salary of three thousand francs and his residence in a charming lodge near the chateau, all the wood he needed from the timber that was cut on the estate, oats, hay, and straw for two horses, and a right to whatever he wanted of the produce of the gardens.