| Unidentified photographer Mount Vernon, USA 1800s (mid-late) Stereocard Private collection of Peter Blair LL/107413 (Alan Griffiths, 24 December 2020) For another copy see Museum of American History (Smithsonian) Id Number: 2012.3033.0922, Nonaccession Number: 2012.3033, Catalog Number: 2012.3033.0922
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