The 1850 census of Page County, VA, lists John Cave (age 60), born in VA and Elizabeth (age 70), born in VA, along with these individuals: Nancy, Ellen, Mary, James, Elizabeth F., and Susan. The age and birthplace fit closely with what I had speculated about John Cave's age and birthplace. I am fairly sure this is Elizabeth Aleshite and her husband because the census for 1840 shows John Cave on the same page with a number of Aleshire heads of household: Conrad, Emanuel, George, Jonas, and in the household of Conrad is Henry Aleshire (age 89), father of Elizabeth Aleshite. It is not proof, but it is evidence enough for me to operate on the assumption that the John Cave who married Elizabeth Aleshite is the son of Thomas Cave of Fauquier County, VA, and the brother of Rhody, Sarah, and Samuel Cave. If you have information to confirm or refute this idea, please contact me.