Rereading the Corinthe bits of the Brick, for reasons, and I came across this bit about Father Hucheloup (Madame Hucheloup’s dead husband, although you probably already knew that). Bolded for your convenience:

It was Grantaire who had discovered Corinthe. He had entered it on account of the Carpe horas, and had returned thither on account of the Carpes au gras. There they drank, there they ate, there they shouted; they did not pay much, they paid badly, they did not pay at all, but they were always welcome. Father Hucheloup was a jovial host.Hucheloup, that amiable man, as was just said, was a wine-shop-keeper with a mustache; an amusing variety. He always had an ill-tempered air, seemed to wish to intimidate his customers, grumbled at the people who entered his establishment, and had rather the mien of seeking a quarrel with them than of serving them with soup. And yet, we insist upon the word, people were always welcome there. This oddity had attracted customers to his shop, and brought him young men, who said to each other: “Come hear Father Hucheloup growl.” He had been a fencing-master.

…Who wants to bet he’s the one who taught Grantaire fencing?