[For once, he doesn't jump out of his skin at her appearing out of nowhere. He doesn't even flinch, and that shows exactly how engrossed he is in these notes right now - full-on work mode, possibly more so than he's been since he arrived. If she'd made a noise, he would've missed it anyway.]
I didn't know you were looking. [Not looking up - he's currently tracing a line of half-eligible scribbles, looking for a specific passage. Give him a moment.]