John H. King - Sarah Chandler

I am looking for any information available on John H. King DOB about 1818, Illinois and his wife Sarah Chandler DOB Sept 3, 1822,Illinois. Children Marcus Boyd, Laura, John Andrew, George, Harry, Mary, William Emmett and Dennis Peyton.
Dennis is my great grandfather and didn't share a lot about the family. His mother passed away when he was 7 and don't know when John H. passed.
They lived in Tennessee for several years. The first 4 children were born in TN and the last 4 born in Illinois.