Was Napoleon I an "illegal" child?

Napoleon collector Kees van der Zwan made the purchase of a lifetime at an antique market in Delft. In 2016, he bought a book with 156 colored prints about the French general's campaigns for €10. When he got home, two loose pieces of paper suddenly fell out of the book.

The hypothesis ran for a long time: the mother of the emperor was courted very close by the Count of Marbeuf, then became a true protector for the young Napoleon...