Yes ,I just found this Watson R. Cooper. His daughter Nellie E. Cooper married a son of my gr gr grandfather Norman W. Cook. Nellie married Norman G ( green) Cook . In the 1920 census for glenwood mills Iowa, Watson was living with daughter and son in law along with one daughter of Norman and Nellies, Winifred. Ancestry lists Watson's burial at farm creek cemetary , Anderson, mills, IA. Also, Watson was in the civil war company F 15th Iowa Infantry, also a listing for his wife, Elizabeth M.Unknown..1848 to 1886.
Alan s. Cook ...Washington state