Is he the same Joseph Baker, b. ca 1840, son of Levi? This Joseph Baker married Ann Eliza Moore, daughter of Andrew Moore of Roane Co. TN who moved to Stoddard Co. in the mid 1840s.
From the 1890 census of Civil War veterans, Stoddard County, MO on micofilm: Castor twp., Joseph Baker "now of Dexter, MO.", Private, Company B. wound to face.
Joe and Ann's youngest children were orphaned by the time of the 1900 census. Their children were Henry, Margaret, Amanda Catherine, Andrew Jackson, Gertrude Lucinda, Ann Maude, and Susan Bertha. I have some male descendants of this line listed who were born in the 1940s and 1960s, but I am not in contact with them and have no idea if any would be interested in having a DNA test done. Many of Henry's descendants moved to the Springfield, MO area.
These Masters and Millers were all part of the western NC Germans. I do not know if any of them stopped over in Roane Co. TN prior to moving to MO.