I live in a 109 year old Victorian home which I purchased in the summer of 2009. Prior to purchasing, the home inspector indicated to me that a fireplace existed behind the living room wall. The walls in the living room have wood paneling on top of plaster. A few weeks ago, I shined a flashlight into the pocket door between the living room and the dining room. I was able to see a chimney in there, but I was unable to determine if there was a fireplace.

How can I determine if a fireplace is indeed behind the living room wall (if possible, without tearing down the wall)?