10/17/1906 Mason, William Horatio to Edison, Thomas Alva
(Mallory, Walter Seeley; Rush, John D; Smith, Dan; Purcell, David) Cement
[CJ614]  Company Records Series -- Edison Portland Cement Company -- Corporate Files: General (1906)
[CJ614ACT; TAEM 203:121]
Courtesy of Thomas Edison National Historical Park.
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