One of my brick walls has been Robert Harvey Campbell, the son of Harvey Campbell and Jane McKee. However, I've made progress thanks to some notes sent to me by a member of the Burck/James line of the family.
Robert Harvey Campbell b. 10 Sep 1856 in Coulterville, Randolph County, IL and d. 1 Oct 1884 Coulterville, Randolph County, IL (Find A Grave 62231549).
Robert appears on the 1880 census still living with his parents. Between 1880 and 1883, Robert marries Mary Ann Kerr.
Mary Ann Kerr, the daughter of John A. and Mary Kerr, was born 9 Oct 1860 in IL and died 16 Nov 1880 Coulterville, Randolph County, IL (Find A Grave 62231587).
Robert and Mary Ann had one child: Mary Kerr Campbell b. 19 Sep 1883 Coulterville, Randolph County, IL.
With the death of her mother, Mary Kerr Campbell becomes an orphan. Members of the Campbell family--aunts Mary Agnes (Campbell) Woodside and Jane Minerva (Campbell) James--seem to have been unable to take in their orphaned niece.
In 1900, Mary can be found with her uncle, Robert H. Kerr (b. Feb 1856 in IL) and his wife Belle, in Birmingham, Ward 3, Jefferson County, AL. Robert was an attorney. He and his wife, Belle, had no children of their own. In addition to taking in their seven and 1/2 year old niece, Robert and Belle had already take in an 11-year-old nephew, Robert K. Marsh.
In 1909, Mary's uncle Robert dies in Birmingham.
In 1920, Mary can be found living with her Aunt Belle Kerr in Birmingham. She is working as a librarian.
In 1930, Mary can be found living with her Aunt Belle Kerr in Birmingham. She is working as a clerk at the power company.
In 1937, Belle Kerr dies in Birmingham.
According to the obituary index at the Birmingham Library website, Mary Kerr Campbell's obituary appears on 24 February 1955. The Alabama Death Index shows Mary as dying 22 Feb 1955 in Tuscaloosa County, Alabama. I've sent for the obituary to see if it includes a list of survivors and a burial location.