[He shrugs at the realization, and it's clear that he doesn't want to talk about it. Remembering it is clearly more than enough, and he doesn't need to do anything else. There's a huff of breath as he looks out over the field.]

Is it that we don't get the information, or do they just not know? Apparently there's a whole lot of stuff left behind. [Keith had been thinking of looking into that himself, but he'd rather take on other angles.]

And if it did get left, why doesn't the current ALASTAIR have it? What happened to them? And why are they risking us by sending us back here?