This folder contains correspondence and other documents relating to quadruplex telegraphy and to facsimile telegraph instruments. There are also many documents pertaining to the suit brought against Edison by Lucy Seyfert, who was the widow of an investor in the Automatic Telegraph Co. Much of the correspondence is by Edison's associate Josiah C. Reiff and by Garrett D. W. Vroom, Edison's attorney in the Seyfert case. Related material can be found in the printed court record for Seyfert v. Edison in the Litigation Series.

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