I found one Hickman family in Hancock Co, IL 1850 census. They have a Joseph who was 12. page 345 - no town listed Dwelling 1076 family 1077 James Hickman 48 M Farmer 300 acres b NJ Mary 46 F NJ Gilliam B (might be William) 22 M NJ Daniel W 19 M NJ John B 16 M NJ Joseph S 12 M IL Mary E 9 F IL James 4 M twin IL Oliver 4 M twin IL hope this helps you. Delores - Salem, OR