Not related but I am a Greene county researcher. all of the following can be found online at http://thelibrary.org/
under Local History digital collections (browse all)
History of Greene County, Missouri, 1883, R. I. Holcombe, Editing Historian
excerpts mentioning David Roper:
Chapter 34 - Franklin Township, Greene County, Missouri
In the southern part of the township David Roper and family game from East Tennessee, and settled just over the township line on the south. David Appleby and James Appleby, with their families, came to section 33, from Bedford county, Tennessee, in 1833. About 1835 C. C. Williamson came from Kentucky and settled on section 29. About the same time came Erastus McMurray and his mother and brother.
The first marriage in the neighborhood of the settlements in Franklin township was that of Lawson Fulbright and Elizabeth Roper, at the house of the bride's father, David Roper, in 1831. The ceremony was performed by Rev. J. H. Slavens, the pioneer Methodist minister. At that time, however, old David Roper lived in what is now Campbell township. This is claimed by some to have been the first marriage of white persons in Greene county at least within the present limits.
following excerpt from five page [740-744]Biography of William Henry Fulbright found in this book
"Past and Present of Greene County, Missouri" Jonathan Fairbanks and Clyde Edwin Tuck
William Henry Fulbright of Murray township, was born near Springfield, Greene county, Missouri, August 14, 1837, and practically all of his life of seventy-seven years has been spent in this locality, which he has seen developed from its wild state to one of the foremost in the state and he has taken a good citizen's part in this work of advancement. He is a son of John Lawson and Elizabeth O. (Roper) Fulbright. He is the scion of two old American families of colonial stock. His grandfather, David Roper, was a soldier in the war of 1812, and fought at the battle of Horse Shoe under Gen. Andrew Jackson. The great-grandfather on his mother's side was a soldier in the Revolutionary war. [Wm H Fulbright's paternal grandfather was one of the first settlers of Greene county , MO]