Original Text:
-Qué qu'vous êtes donc devenu, m'sieu Lebrun ?...
- J'suis devenu marron... à la Bourse!..

Translation:
- Whatever became of you, Mr. Brown?
- I became an unlicensed broker at the Stock Exchange...

(Play of words: "marrron" is a shade of brown, which is the name of the man, but it also means in colloquial language "unlicensed broker")