Can you tell us if you can read any of the names? I have a list of all the known cemeteries in Concordia Parish on my Concordia Parish LAGenWeb Project Site at www.rootsweb.com/~laconcor/
There are several cemeteries known to be in the Black Lake - Monterey - Horseshoe Lake area. How far are you from the School? I might can find if it is a known or unknown cemetery from the GPS coordinates. My daughter lives in Monterey on Workinger Bayou and I go there quite often so if you tell me about where the cemetery is I may be able to find the right Broussards.
Ann Allen Geoghegan