Hi
I believe this is the Karoline you are looking for.
Here in the 1900 census:
http://digitalarkivet.no/cgi-win/WebCens.exe?slag=visbase&am...and in the 1910 census:
http://digitalarkivet.arkivverket.no/ft/person/pf01036333009...Karoline and Carl Fredrik are married Oct 18, 1893 in Fredrikstad according to FamilySearch, but I don't find them neither there nor in Halden.
Vivi