Regarding the Munn store at Laneburg, I happened upon a notation that Goodspeed Publishing's Biographical Memoirs of Southwestern Arkansas (a book that any good genealogical library has on hand) has information about W. R. Munn (born 1858 AR), who owned a store at Laneburg, as well as a farm, sawmill, cotton gin, and gristmill there. He married Tina Garrett and was the son of Neil Munn of TN and AR. His grandfather was Duncan Munn (born in Scotland).