"Bar may be willing," says Combeferre. He is thinking of some examples of her mischievous sense of humor. The fleur de lis room, just for instance.

"Other than that, the only idea I have--besides the extreme solution, which I agree is not to be contemplated yet--"

(Yet. Even for Combeferre, it's a 'yet,' and not a 'never.')

"--the only idea I have is to appeal yet again to Valjean, and try to persuade him. And I know you would be grieved to place him under any more strain. So perhaps that idea should be rejected as well."