FindaGrave has a lot of information on the WALTON family of Hand County. David WALTON & Louisa CARL, both b. Ohio, were of Farmington, Cedar County, IA, from 1860 - 1880, and of Hand County by 1885. Charles WALTON m. Bell CORA, 21 Feb. 1878, Muscatine Co., IA. She was actually Isabella CORY.
FamilySearch.org has censuses. South Dakota Births site also has information.