I have been researching various branches if the Ivins family (my grandmother was an Ivins from Rock Island, IL). I don't have anything on Mary Elizabeth Ivins Born 10/23/1941 in or near Galesburg but I did notice a Harold R. Ivins who was living in Galesburg in 1940-1942 with his wife Janet C. Ivins. The 1941 Galesburg directory lists them at 895 West Main and indicates he was a salesman (name listed as Ivin). In 1942 Harold Remington Ivins, same address, registered for the draft. Record indicates he was born 11/11/1894 at Fort Madison, Iowa. It appears this Harold died in March 1966 and was buried at Fairview Cemetery, Lee County, Ia. Not sure if he was the same Harold Ivins who died 25 march 1966 in DeKalb County, IL. It appears Janet C. Ivins was born 4/23/1906 and died 1/12/1991. Social Security Death Index shows last benefit address in Gurnee, Lake County, IL. The Social Security Death Index shows Harold Ivins born 11/11/1894 died March 1966 last benefit address Sheridan,LaSalle County, IL. This Ivins family family was originally from New Jersey.
Unfortunately more recent people are sometimes harder to track but hopefully this information might provide some clues.
Paul