"For a long time, we really didn't need to name the roads. There were few enough of us that it was easy to keep up with everybody." Even now, it's really just a precaution. I've started to learn how easy it can be to miss someone new.

"Would you mind making me a copy of this map?" I ask. "I've got one of my own, but yours has a lot more detail. I've got paper and pencils."