Data source is the 1990 book, "Moomaw-Mumma-Mumaw-Mumaugh Genealogy" compiled by Robert Austin Moomaw (deceased).
Appears in the 1920 Virginia census living in Roanoke City, VA, Chesterfield Co., Jefferson District, ED19, sheet 1A
Harry is 37 and Violet is 30, no children
1930: Roanoke, Roanoke (Independent City), Virginia
Harry G Mumma 47, b: PA/PA/PA Electrician, steam railroad
Violet H Mumma 40, b: PA/PA/PA
"Find a Grave" photograph submitted by Dana Dancy
https://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=55698916