Looks like he was in IL prior to KS.1880 census Smokey View, Saline Co, KS:
Category: Name;Relationship to head of household; Marital Status; Gender; Race; Age; Birthplace; Occupation; Father's Birthplace; Mother's Birthplace.
Nils JOHNSONSelfMMaleW44SWEFarmerSWESWE Christina JOHNSONWifeMFemaleW39SWEKeeping HouseSWESWE Hilda JOHNSONDauSFemaleW5ILSWESWE Albert JOHNSONSonSMaleW3KSSWESWE Martin JOHNSONSonSMaleW9MKSSWESWE
1900 census Wharton Co, TX:
Johnson, Clara(sic), h, b Dec 1840, 59, wid, 6 ch, 4 lvg, b Swd, Swd, Swd came to U.S. 1871, been here 29 years. " Carl Albert, s, b Aug 1878, 21, sgl, b KS " Nels(sic), s, b May 1886, 14, sgl, b KS
TX State Archives in Austin has a TX state wide death index 1903-1940, they should be able to give you county of death for Klara/Christina.You could obtain a copy of her death certificate which should show the names of her parents.
Have you checked for records in the Swedish Lutheran Church where the family is buried?Also, check for obituary on Nils, you never know what helpful little tidbits will show up in obits.
You might look for homestead records for Nils in Kansas.From birth of children, looks like they lived there about 10 years.If he applied for a homestead he would have had to prove he was a citizen when he got his homestead.He could apply before final citizenship papers, but would have to have them to get before he could officially receive the homestead at the end of the five year period required to live on and improve the land.Younever know what you will find in those files.