John stirred at the sound and Joan's sudden stillness- he'd been snatching sleep where he could while the others kept watch with relative ease despite their predicament, something he seemed to have less trouble with than either of his compatriots. Soldiering would do that to you, he supposed. He registered Sherlock's lack of tension before he recognised Howard's voice (though the recognition wasn't too far behind the instinctual response to trust Sherlock's danger assessment), and sat up, looking for him.

"Howard?"