Litigation Series -- Quadruplex Case, Volume 72
"Telepost. A System of Automatic Rapid Telegraphy." Advance Prospectus No.6538. Ca. 1907-1908. A 12 page circular containing information on the Telepost system. Its developer, Patrick B. Delany, was an associate of Edison's in the Automatic Telegraph Co. during the early 1870s.
Courtesy of Thomas Edison National Historical Park.