found: Overton, C. Dat lonesome stream [SR], [193-?]:label (Marion Cumbo, 'cello)
found: NY Amsterdam News, Oct. 6, 1990:p. 29 (Cellist Marion Cumbo dies in nursing home. Marion Cumbo; d. Sept. 17, aged 91; b. New York City, Mar. 3, 1899)
found: Ancestry.com WWW site, Mar. 28, 2008:Social Security death index (Marion W. Cumbo; b. Mar. 14, 1899; d. Sept. 1990)
found: African American National Biography, accessed April 17, 2015, via Oxford African American Studies Center database:(Cumbo, Marion; cellist, musician; born 01 March 1899 in New York, United States; studied at Juilliard School of Music, New York; was featured soloist at the annual convention of the National Association of Negro Musicians, New York (1920); became a part of the Negro String Quartet (1920s) and soloist of the Philadelphia Concert Orchestra; performed with Cosmopolitan Little Symphony (1940s); played with Senior Musicians' Orchestra of AFM Local 802 (1970s); was a member of the Symphony of the New World (1964-1978); established Triad Presentations at Alice Tully Hall (1970); died 17 September 1990 in New York, United States)