Is this a 17th-century Twitter? Maybe. (Even before this scrap came to light, the promotional material for the play Brief Lives called Aubrey “the world’s oldest blogger.”) The scrap both does and doesn’t mirror a tweet — or a status update, or a Tumblr post, or anything on any social network. It has structural limits. It’s odd, jotted, and hasty. It brimming with scribbled social information, meaningful only to those steeped in its world.