2004-10-30/2019-04-29 - From the OHS PC Database, derived from A Guide to North American Organbuilders, by David H. Fox (Richmond, Va.: Organ Historical Society, 1991). - Son of John W. Gratian, brother of Warren Gratian; with family firm of Alton, Illinois, 1915. Source: The Diapason, July 1915, 9.
2015-09-22/2020-04-09 - See main entry: Gratian Organ Co.
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