It's out there, I know it. I even occasionally catch glimpses of it as I am driving to and from fencing practice. Even so, it amazes me that some people--i.e. other writers--seem to profess to know anything about it, at least on a scale larger than, say, the several hundred or maybe even thousand people they happen to encounter on a regular basis in their everyday lives. How do they do it? I suppose, in part, I try to do the same thing, if with a time period somewhat distant from ours, but in actual fact I know (and am--I am not embarrassed to note--somewhat comforted to realize) that what we actually know about what medieval people thought, for example, about Christianity, is limited to a few dozen writers at most, tops a few hundred. Indeed, if one spent one's lifetime reading nothing but the works of these authors, it would probably be possible to read almost everything they wrote, that is, insofar as it survives. Nobody could do that with even what is published in a s...