The scribes of early medieval England wrote out their vernacular poems using a format that looks primitive to our eyes because it lacks the familiar visual cues of verse lineation, marks of punctuation, and capital letters. The paradox is that scribes had those tools at their disposal, which they deployed in other kinds of writing, but when it came to their vernacular poems they turned to a sparser presentation. How could they afford to be so indifferent? The answer lies in the expertise that...