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These records of the Plaza Land Corporation were accumulated and maintained by Edward R. Grace, secretary and member of the corporation's board of directors. The records, including minutes, memoranda, and correspondence, trace the development of what would become the Hotel Pontchartrain in Detroit. Within the records are files for the Corporation's various officers and directors, investors, and those otherwise closely associated with the project, including Detroit Mayor Albert E. Cobo, Conrad Hilton, Fred. C. Matthaei, H. Lynn Pierson, Douglas Roby, and Oscar Webber among others.