I had forgotten hours and days by then. My arms ached, my back ached, my legs ached. My head ached worst of all, some part of me tethered back to the valley, stretched out of recognizable shape and trying to make sense of myself when I was so far from anything I knew. Even the mountains, my constants, had disappeared. Of course I'd known there were parts of the country with no mountains, but I'd imagined I would still see them somewhere in the distance, like the moon. But every time I looked behind me, they were smaller and smaller, until finally they disappeared with one final gasp of rolling hills.