There are lots of Briggs's in the Nebraska City - Peru area of Nebraska, southeast of Omaha.
Names that stand out in our tree are Indiana Briggs and America Briggs.
I was born in 1958. My Grandfather was Frederick Carrol Briggs.
I have a distant cousin named Larry Briggs in the Omaha area as well. I have other distant great-uncles in Iowa (uncle Lyle)
My forebearers traveled back and forth from Indiana to Nebraska and left decendantsin about five States. The name Flint sounds framiliar, but nothing specific. The relatives I'm met are in the Peru - Nebraska City area. maybe someone there knows.
My dad has the printed material and is in Australia at this time. I'll check and see what the records he got copies of say when he returns in a few weeks.