Hi Thad, I have the Marshall County History book and there is a history on Carl and Helga (Kristiansen) Gilthvedt. Carl died in 1889 and is buried in Foldahl Cemetery and Helga died 16 Nov 1925 and is buried in Northwood Church Cemetery. I have a partial list of burials at Foldahl "Nyed" Cemetery and will send you information on its location. I can also send you a scanned copy of the history on Carl and Helgawhich was written by their son, Erling Gilthvedt. Please contact me at marcyj@invisimax.com