1860 census: Ward 5, Carroll Parish, Louisiana Wife is Lucinda age 21 born MS (1 child in household)
1870 census: Ward 5, Carroll Parish, Louisiana Wife is Lucinda age 30 born LA (2 children in household)
1880 census: District 39, Ward 2, Richland Parish, Louisiana Wife is Mary age 35 born LA (3 children in household)
1900 census: District 98, Police Jury Ward 2, Richland Parish, Louisiana Wife is Lulu age 22 born LA She's had 2 children, both still alive. 4 other of his children are still in household from previous wife. Record shows they've been married 4 years.
married to Lucinda approx 1858
married to Mary A Oldham 9/20/1882 West Carroll Parish, La.
married to Lulu approx 1896
1920 the john living next door to Morris in Lafayette McGaha's household is not this John. He's only 36 years old and is Lafayette's brother in law, not his wife's grandfather John QA born 1829 as John died bef 1910.
Hope this helps correct your data. Please let me know if you have any data that I didn't post. Thanks.