This happens in the home of Mrs. Tristram, who introduced him to the woman he loves, a woman who becomes a Carmelite nun for life.  
A side plot in this novel involves the conniving Noemie Nioche, a mediocre artist.  At the end the protagonist regrets burning a piece of incriminating evidence given to him by Mrs. Bread.  This happens in the home of Mrs. Tristram, who introduced him to the woman he loves, a woman who becomes a Carmelite nun for life.  The protagonist hopes to get her back by blackmailing Urbain and his mother, the marquise, who seem to have engineered the death of the Marquis de Bellegarde.  FTP, name this work centering on the relationship of Claire de Cintre and Christopher Newman, a novel by Henry James.
A side plot in this novel involves the conniving Noemie Nioche, a mediocre artist.  
The American