Mysteries of the Mansion"will take place at 7 p.m. on the third Thursday of each month. These extended tours will allow guests to tour the mansion at night, examine archival materials, and hear some amazing stories. Guests are asked to RSVP in advance. Cost for the tour is $20 per person. To make a reservation for this tour, please call 405-525-5325 or email overholsermansion@preservationok.org. Regular hours of operation at the mansion are Tuesday through Saturday, 10 a.m. to 3 p.m.…