He became so useful and showed so much skill, that Saint Laurent made him become an abbe.

Thus raised in position, he passed much time with the Duc de Chartres, assisting him to prepare his lessons, to write his exercises, and to look out words in the dictionary.
I have seen him thus engaged over and over again, when I used to go and play with the Duc de Chartres.

As Saint Laurent grew infirm, Dubois little by little supplied his place; supplied it well too, and yet pleased the young Duke.

When Saint Laurent died Dubois aspired to succeed him.

He had paid his court to the Chevalier de Lorraine, by whose influence he was much aided in obtaining his wish.