The records for Riverside Cemetery in Stoughton, Dane Co., WI have some of the Douglas family members as follows:
Jeremiah born Feb. 11, 1849 died April 11, 1892.
A Robert died June 1869
Josiah born July 8, 1822 and died March 31, 1886
Nancy A. born April 4, 1831 and died June 9, 1889
I will try to get to the state library at some point and check out the Stoughton newspapers. It could be very likely that they would be in Norwegian. So far I have not located obits in the Madison papers. I live just outside of Madison, the library being just 10 miles from here. I was born in Madison and have been doing genealogy for over 30 years. Perhaps you have these cemetery records. Sandie