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The American Institute of Architects Archives
Membership file contains a request for photographs of a DC building, membership in a second chapter, annoucement announcement of new firm, posthumous inquiry from client, and obituary. His membership application is not in the AIA Archives, and there was no written nomination form for Fellowship in 1913.
Avery Library, Drawings and Archives Collection, Columbia University
For more information https://library.columbia.edu/locations/avery/da.html.
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