Hall/Mysinger of Deer Park, TX

I am searching for information on "MICHAEL & NANCY MYSINGER" from Boone County, Arkansas via Tennessee.I have been able to locate them in the 1880 Arkansas census but not in the 1900 census.It is my opinion that they died sometime in that 20 year period but I have not been able to discover when.Also, I am looking for information on "ROLLIN REYNOLDS and family" of Pike County, Illinois.I am particularly interested in information about his son "JOHN GRANVILLE REYNOLDS" who was born c. 1852.I located Rollin's gravestone so I know his date of death and that of his wife "DELILAH SLADE" but I would like to learn something about her family. All I know is that she was born in Kentucky. Any information will be appreciated.