Super User Omeka MetsExport Plugin The software used to generate this document is called Omeka MetsExport, which operates as a plugin for Omeka. Documentation can be found at http://github/MetsExport/ 100.jpg Margaret Chalfont Mackey Gates (December 24, 1890-December 29, 1981) daughter of Alfred Wilson Mackey and Minerva Spencer Mackey and wife of Hoagland Gates. Before her marriage to Hoagland, Margaret served as “Principal of the Junior Department” at the Ogontz School for Girls in Abington, Pa and later as an instructor at the prestigious Tower Hill School in Wilmington, Delaware.