An extensive collection of documents from the fur trade in the Rocky Mountains, mainly dating from 1810 to 1840. (
http://www.xmission.com/~drudy/amm.html
)
Text and images of documents describing the Jesuit plantations in the 1820s and 1830s. Includes a Jesuit's defense of slavery. (
http://www.georgetown.edu/departments/amer_studies/jpp/
)