Samuel Roscoe McAllister

Samuel R. McAllister was my grandfather, born about 1880, in Kansas.  His mom was born in Wisconsin.  His dad was born in Illinois.  He married Theressa Beireis, but I don't know where or when.  They lived in Iowa, South Dakota, and Missouri.  That is all I know about him.  If anybody has any information about him, it would be greatly appreciated.