This shows Ishmael at 21 years old living with his mother and siblings:
"United States Census, 1850," database with images, FamilySearch(https://familysearch.org/ark:/61903/1:1:M885-Z6M : 9 November 2014), Ishmael Barnes in household of Maria A Barnes, Berkeley county, part of, Berkeley, Virginia, United States; citing family 614, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).