The Henry Overholser Mansion in Oklahoma City offers visitors to the mansion an opportunity to learn more about the history and collections of this Oklahoma City treasure with new Director's Tours, held each Saturday at 2 p.m. During the tour, guests will go behind the scenes and examine archival materials as well as other collections of the mansion not available during regular tours. Cost for the director's tours is $15 per person. To make a reservation for this tour, please…