Marius is taking in very little of this, given everything else on his mind. Cosette's mother, he gets that far and stops. Her mother! Well, very well, then! Cosette and Joly seem perfectly able to sort through the problem of sending word, and his thoughts start to drift away, until Cosette looks to him.

"Yes, of course," Marius says. He stands to offer her his arm. "I shall take you to her." ...Not that he knows where she is.