Josiah McClung first married Mary Fletcher in Monroe County, GA on 23 Aug 1825.
He later married Margaret Elizabeth Rister.
Mary Fletcher is the sister of my GGG-Grandfather, Thomas Fletcher Sr.
Margaret Elizabeth Rister is the sister of my GGG-Grandmother, Martha Jane (Rister) Fletcher.
Josiah is not far from Thomas and Martha in the 1860 census of Milam County, Texas.
Thomas Sr., my GGG-grandfather, was born 13 Jan 1812 in South Carolina; married Martha 25 Dec 1835 in Troup County, GA; had resident census hits in 1840 in Chambers Co, AL; 1850 in Ouachita Co, AR; Milam Co, TX in 1860 and 1870. He died 30 May 1879 in Milam County, and is buried in the New Salem Cemetery outside of Rockdale, TX.
I think there is definitely a lot we can learn from the Fletcher/McClung lines crossing.