I have found a Ferol Derrick on the 1930 census who may be the Ferol E. WillfordWilford that I am looking for. She is listed as divorced and the propriator of a rooming house in Minneapolis City, Hennipin County, Minnesota. She is white, 37, married at 16, born in Iowa.
If anyone has any information on this "Derrick" I would appreciate a response.