Lemprun himself knew Mademoiselle Thuillier, and considered her one of the worthiest and most conscientious women in Paris.

Brigitte then, for the first time, allowed her investments on the Grand-Livre to shine forth, assuring Lemprun that she should never marry; consequently, neither he nor his wife, persons devoted to the main chance, would ever allow themselves to find fault with Brigitte.

Above all, they were greatly struck by the splendid prospects of the handsome Thuillier, and the marriage took place, as the conventional saying is, to the general satisfaction.
The governor of the Bank and the secretary were the bride's witnesses; Monsieur de la Billardiere, director of Thuillier's department, and Monsieur Rabourdin, head of the office, being those of the groom.

Six days after the marriage old Lemprun was the victim of a daring robbery which made a great noise in the newspapers of the day, though it was quickly forgotten during the events of 1815.

The guilty parties having escaped detection, Lemprun wished to make up the loss; but the Bank agreed to carry the deficit to its profit and loss account; nevertheless, the poor old man actually died of the grief this affair had caused him.