I have a copy of a term paper written about Heinreich by Marian Bremer in 1945. She was the great granddaughter of Heinreich Krohn.

Also I received this from a distant cousin:"On our trip up to Cedarburg and searching records. Heinrich is buried in a different cemetery than his wife Margarethe or Engelbert. Caroline is buried on the farm, Heinrich is buried in the ZUR RUHE cemetery, Margarethe is buried in the Catholic cemetery, and Engelbert and several others are buried in the Immanuel Cemetery in Cedarburg. I have an approximate area to where Heinrich is at, very few surviving stone to make the graves. I did get the information that Margarethe was buried in the Catholic cemetery (Immanuel) but the Catholic church holds those record, not the city and was not able to obtain them when there. I have the exact locations on John C, Maria, Engelbert, Alma, Erna, Otillia, Edna, and a baby buried in the family plot in 1891. This map also holds the names of 3 Mintzlaff(also in family tree)in graves adjoining the Krohn plot. The map for Heinrich's grave holds only 72 plots for poorly or non marked graves in that cemetery."