Listed as parents of Henrietta Carter when she married Fred Holman.Reference ID: p 64 , GS Film Number: 1436206 , Digital Folder Number: 004312809
"Iowa, County Marriages, 1838-1934", database, FamilySearch (https://familysearch.org/ark:/61903/1:1:XJ8R-LT1 : 8 March 2016), William Carter and Martha Crose, 1865.