Anton Jensen and wife Mathilda Mikkelsen

I'm am searching for any information that will lead me to learn more about a family that I have never meet.
Anton Jensen born in 14 Skjød, Houlbjerg, Viborg, Denmark Feb, 1854, Mathilda Mikkelsen born in Denmark 1857 and I believe died in Black Hawk Co, Iowa 1920. There children
Marie C Jensen born in Denmark 1886
Emiel Jensen born in Denmark 1888
Thorvel or Torvel Jensen born in Hughes Co, South Dakota,
My father Victor Edward Jensen born in Hughes Co, South Dakota,
Any information on this family would be greatly appreciated.Thank you.Dennis Jensen
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