06/10/1885 Edison, Thomas Alva to Preece, William Henry
(Edison Lamp Co; Upton, Francis Robbins) International business operations; Incandescent lamp
[LB020]  Letterbook Series -- General Letterbooks: LB-020 (1884-1885)
[LB020341; TAEM 83:186]
Courtesy of Thomas Edison National Historical Park.