"That'd do it." Keltham is actually slightly impressed - that was better than he'd visualized being possible to get, himself.
Keltham has met with Isidre again. Many things were discussed of which he can only tell Carissa some right away (so as not to give her impression that the parts he's talking about were all that happened). Isidre does think it's safe to ask Carissa some direct questions of the 'what happens if I do this?' type.