That earlier marriage in Wilcox Co, AL may not be the same Lazarus Smith. This one's wife's name is Ritta in 1870 but who knows where he was living in earlier years. Ritta is several years younger than he is so she is possibly a second wife. He could be the one who was married in 1838.
1870 United States Federal Census Name: Lazrus Smith Birth Year: abt 1816 Age in 1870: 54 Birthplace: Alabama Home in 1870: Mims, Wilcox, Alabama Race: White Gender: Male Household Members: Name Age Lazrus Smith 54 Ritta Smith 47 Herbert Smith 22 Thomas Smith 18 Dumpy Smith 14 Jimmy Smith 4