Consider expanding the mirrored data

[jechols]

Essays might be a good thing to put here, since we don't have an easy way for people to administer essays, nor to get at essays already in Chronicling America.

Custom MARC records could be useful here as well, but probably should be separated from the official ones, though that would probably require a change to ONI.

There might be other bits of data we could mirror here. Feel free to expand this ticket.