Thursday, September 22, 6:30 p.m. at the Grand Village of the Natchez Indians. As part of the Archaeology Program series, Eric Glatzer will present Secret of the Ouachita, a documentary about the prehistoric mound building civilization that flourished along the Ouachita and Mississippi Rivers. The film includes interviews with archaeologists and aerial photography. Glatzer is an executive producer for Phat River Studios in Natchez. For more information call 601-446-6502 or email the Grand Village.