The selected documents in this folder cover the years 1929-1931 and 1936. There is also one undated item that was probably written during the mid-1910s. The documents consist primarily of notes exchanged between Thomas Edison and his son Charles. A 14-page communication from June 15, 1931, discusses Charles's problems with George E. Stringfellow, vice president and general manager of Thomas A. Edison, Inc. A 1936 letter by William H. Mason, former superintendent of the Edison Portland Cement Co. and inventor of Masonite, contains reminiscences about his work with Edison in 1902-1903.