"Primary Sources"

If you haven't already, check out Dan Alosso's "Reading Primary Sources" posts at The Historical Society -- one on estate inventories, the other on bank notes. If you can get beyond the historian's entrenched and hopelessly imprecise terminology of "primary source," they're quite interesting, especially the one on bank notes. Inventories have tended to fall between the chairs of history and genealogy (some published will compilations purposely omitted them).