"If we were underground right now I could sense about as far as that hill," he says, pointing at a hilltop somewhat less than half a mile away. "It's harder aboveground, although I don't think I'm as badly affected as most dwarves. Some people say that Stonesense is hearing the song of lyrium, but I don't think that can be the whole story because most kinds of stone don't have any lyrium in them - at least not that I know of - and we can still sense them just fine. It is true that lyrium is much, much more obvious to Stonesense than anything else. It's like it's... brighter, or louder, to put it in terms of other senses. Although if I had to pick another sense that Stonesense was most like, I'd go with touch. Touch combined with the thing where you know where all the parts of your own body are without looking."