"There are doctors, yes." Enjolras is no more doctor than Bossuet, and has (he incorrectly thinks) less recollection of what Joly told him recently on the subject. He will let Bossuet be the judge of whether he ought to consult them.

"As for rooms, the proprietors extend credit nearly indefinitely, especially to those without funds. I have rooms which you'd be welcome to share, though there's only one mattress. Grantaire too, doubtless."

Bossuet has roomed with all of them enough that he feels comfortable with that last statement -- though Grantaire will have to be located, and then to have matters explained to him, as a prerequisite.