Immigration is entering a country where you are not a native to take up permanent residence. Emigration is leaving a country where you have been a citizen.
General Land Office is now called Bureau of Land Management of the United States Department of Interior. Some federal land records are here, some in the National Archives and some are in state and university libraries. Public domain land states are largely available on the Bureau of Land Management, General Land Office-Eastern States free website.
Source: Derivative Materials that offer alternate versions of the original: this source is abstracted, compiled, formed into a database, transcribed, translated or otherwise derived from the original.
[Sources & Evidence]
Check for cemetery records with the church, sexton and/or funeral directors. Visit the cemetery and take a picture of the tombstone. Check the obituaries in that time frame.
Marriage Records may only be records of the wedding. However, you may also find the Application for Marriage completed by the bride and groom-to-be. Marriage records may also be corroborated with church records. Check everything for correctness. There could also be a newspaper account of the wedding.