I am looking for information on Nicholas Siemer. He was born in Germany approx. 1803. He married Mary Catherine Gesina Heller in St. Charles Co., Missouri in 1942. His first child, Josephine was born 3/1/1843 in St. Charles County, second child, Menard was born in Meppen 11/16/1844. Specifically I am looking to see if he filed naturalization papers for citizenship in St. Charles County, Missouri, or Calhoun County, Illinois. Any help would be greatly appreciated. I am trying to find when he came to the United States.