“S’ why I had to use the mask back in Gallipoli,” he adds. He now figures that the sniper hadn’t realized his blindness, he doesn’t really know who he is. Still, he lets it at that - he knows that Henry is probably quick enough to do the math in a mere moment - leaves him to do the scan and the registry.

“Ah, yeah,” he looks up, looking for one specimen. “Found a sort of lichen that reacts to sound. Grows in dead trees and airy places. There—“ he points at a dead tree on the floor. “Didn’t really find a use for it, though.”