I'm sorry to say I do not have any more information on the Andrews family buried there. Get a hold of the library in Warren co., IL they have an online email and email the Genealogical Society. I do not do research anymore on account of too many irons in the fire so to speak and it's just got to be too much for me. But someone there can help and Richard Clark is very good plus, Carol they are both members of the Warren co Genealogical Society.
Sorry I couldn't be of anymore help to you.
good luck in endeavors and happy gene hunting.
Happy Trails to you till we meet again
Foxie
Illinois American History & Genealogy Project
http://www.rootsweb.ancestry.com/~ilahgp/illini.htm
http://www.usgennet.org/usa/il/county/knox/
http://www.genealogytrails.com/ill/knox/
http://www.usgennet.org/usa/il/county/warren/
http://www.genealogytrails.com/ill/warren/index.html
http://www.usgennet.org/usa/il/state2/index.htm
http://www.rootsweb.com/~ilhca/index.html