Back of card: G.A.R. Monument, National Cemetary Area, Chalmette National Historical Park. The remains of nearly 15,000 veterans and others eligible for burial in a national cemetery have been interred here since this was set aside as national cemetery in 1864. Dum Tacent Clament inscribed on this monument is translated to mean "Though Silent, Still Let Them Be heard!" The cemetery is within Chalmette National Historical Park administered by the National Park Service of the U.S Department of the Interior. New Orleans - Americas Most Interesting City.