This folder contains documents, primarily correspondence, covering a wide variety of subjects. Some of the material relates to personal matters. Also included are documents that deal with more than one subject, such as a letter about both the electric light and the phonograph. Documents concerning subjects that do not fall under the main subject categories are also filed in this folder. Among the items are numerous letters from George P. Lathrop, who collaborated with Edison on a science fiction novel called Progress. There are also letters from Sherburne B. Eaton, Edison's attorney, regarding a variety of legal matters.

Approximately 90 percent of the documents have been selected. The following categories of documents have not been selected: routine correspondence from the law firm of Eaton & Lewis regarding salaries; documents that duplicate information in selected items; duplicate copies of selected documents.