???A Selma Mansion Christmas??? hosted by the Norristown Preservation Society will be 10 a.m. until 4 p.m., at the mansion, 1301 W. Airy St. There will be Yuletide customs of both 18th and 19th century America, music by Colonial Revelers and the Norristown Chorale, apresentation by Mary Reynolds on fashion during the Civil War, historic plays and games, crafts and other activities for children and