Hi,

Have you been able to discount these two Roberts with the last name of McMillan and Mixon

1870 United States Federal Census Record
about Robt Mcmillen
Name: Robt Mcmillen
Estimated Birth Year: abt 1862
Age in 1870: 8
Birthplace: Alabama
Home in 1870: Bonham, Wilcox, Alabama
Race: Colored
Gender: Male

I did find two Robert Mcmillens' in 1880.

1870 United States Federal Census Record
about Robt Mixon
Name: Robt Mixon
Estimated Birth Year: abt 1860
Age in 1870: 10
Birthplace: Alabama
Home in 1870: Rehobeth, Wilcox, Alabama
Race: Colored
Gender: Male

I did not find Robert Mixon in 1880. However, I did find a Robert Mixon in 1900 who was living near Mose Wood and your Robert Norris.

Sorry, I looked in 1870 for Robert Norris but no luck,

Tony

T