Harry O. Sooy (1875-1927) worked at Berliner Gramophone Company and Victor Talking Machine Company and was involved in the development of American sound recording. His papers contain a diary photocopy that is either a typed original or transcript of a diary that Sooy kept from the time of his employment with Eldridge R. Johnson (1867-1945) from 1898 to the end of 1925. Also included are four miscellaneous items: formula for grading and grinding precious stones, regulations governing the Victor Cooperative Beneficial Association, Red Cross benefit concert, and United War Work Campaign concert.