This folder contains correspondence and other documents relating to quadruplex telegraphy and to the use of chemical printers as stock quotation instruments. Some of the documents deal with the ongoing legal battles over Edison's automatic and quadruplex patents. There is also material pertaining to foreign royalty payments. Much of the correspondence is by Edison's associates, George B. Prescott and Josiah C. Reiff.

All of the documents have been selected except for duplicate copies of selected documents.