Harry had taken the watch, despite being exhausted as well; he was more awake than Hermione, at least. Or so he'd thought. The woods were more hypnotic than usual tonight, and he blanket he'd wrapped around himself was a little too warm. He didn't think he had fallen asleep, but he startled at the sound of voices. How long had they been there? He jumped to his feet, leaving the blanket crumpled by the tree, and lit his wand, looking around.
There, that looked like Hermione - and Ron. No danger, then, just Ron returning. Still, Harry should have been paying better attention, should have been aware of what was going on, even on the other side of their camp. He kept his wand raised as he approached, just in case there was something he was missing.