Agricultural Census for 1850-1880 is available in Ancestry, but a bit tricky to get to. From the main page, hover over the "Search" option at the top, and select "Card Catalog." Search for "Census Non-Population Schedules" and click on the result. From there, you can either search by name OR browse the schedules by using the menu on the right to go to Virginia and Cumberland County.
Ancestry Library Edition is an academic version of ancestry.com. There are images of original documents and includes narratives, oral histories, indexes and abstracts to other resources. Over 30,000 Ancestry.com record collections and 11 billion records available to search. Record collections span the 1500s–2000s.
A project to enhance access to records and manuscripts in the collections of the Library of Virginia that include names of African-Americans.
About 2,000 pages of family histories based on colonial court order and minute books 1790-1810 census records, tax lists, wills, deeds, free Negro registers, marriage bonds, parish registers, and Revolutionary War pension files.
The Chancery Records Index (CRI) is a result of archival processing and indexing projects overseen by the Library of Virginia (LVA) and funded, in part, by the Virginia Circuit Court Records Preservation Program (CCRP). Each of Virginia's circuit courts created chancery records that contain considerable historical and genealogical information.