Jim listens, and for a while he just looks at him.

"You should immediately report that to anyone you know in the Guard, or the Knightryders," he says, extremely seriously. It's far from a rebuke, but given what he's seen, he can't take this lightly - he doesn't blame Ianto for not knowing, he wasn't here, and things have been peaceful since his arrival. "I don't know if it's possible, but if they think it is, there's reason to believe they're right. The Altar is accessible from Wyver and should be checked out sooner rather than later."

He's pretty tired, but not tired enough to blow this off. 'Processing' is a luxury he doesn't think he's ever had, even before Starfleet.