Hope this helps out with what you are looking for.

I am researching Slaves at Tayloe Plantation in Prince William County, VA. At the VA Historical Society under African American Manuscripts - No 697 Tayloe Family of Richmond City, VA papers, 1650 -1970; 27,900 items - MSS1T2118d. Microfilm reels C163-213.

Also an Account Book 1808-1827 (sec.49) inventories of slaves in Neabsco and Wellington, Prince William County.

Also section 185, 188, 189, 192, 199, 200, 202, 240 and 250 for years
1829-154.

Loose inventories are in section 113 organized by VA counties.

I don't know if these two areas in VA are what you're looking for.

George Dozier