I've been researching the Indiana Dovers.There are very familiar names in your message. Zephaniah, Greenbury, Harmon.
Do you birthdates for these folks that went from GA,IL to MO?I would like to compare.
There is also the following Dover who was born in MO. Jefferson Charles Richard Carl Monroe Dover]] (ALL ONE NAME) he died in 1919 and is buried in Greene Co. Bloomfield, IN.According to the 1900 Census he was born about 1873.Maybe he went by Monroe???