The Back of Riordan Mansion circa 1911 ID: 1005 | This file appears in: The Riordan Mansion State Historic Park Notice the different styles on the second floor of the duplex. Michael has not added his sleeping porch yet. | Source: Riordan, Richard, from Northern Arizona University. “Oral History Interview with Richard and Beatrice Riodan [with transcript and photographs], June 15, 1976,” available at http://archive.library.nau.edu/cdm/singleitem/collection/cpa/id/64437/rec/12. Download Original File SourceRiordan, Richard, from Northern Arizona University. “Oral History Interview with Richard and Beatrice Riodan [with transcript and photographs], June 15, 1976,” available at http://archive.library.nau.edu/cdm/singleitem/collection/cpa/id/64437/rec/12. "The Back of Riordan Mansion circa 1911 " appears in: The Riordan Mansion State Historic Park