Hm. A buddy system wouldn't work, because even if they slept in shifts, that still leaves a window where the person on watch isn't being observed... and I imagine enforced pairs would only result in everyone becoming irritable, anyway.

[ really, he doubts this guesswork is going to go anywhere. they don't have enough information, and they have no way to test their theories. but it's something to talk about, since the subject is on their minds anyway. ]

Were they grouped together in timing?