Combeferre examines the pictures. Of those Enjolras hasn't recognized--"This one is a porter," he says, "and that one a longshoreman, and he's among those who survived. In my timeline." He glances at Enjolras, for just a moment.

Then he turns back to the immediate problem. "Bad enough, yes. We've discussed the possibility of sending warnings back to our people, through Valjean. Beyond that--might we confuse the spy? Perhaps feed him false information?"

There's really no need to voice the most extreme solution just yet; it's premature, and it's also not as though any of them are ignorant of it.