These are the correct people, however, Helene was born in Kozki, Russian Poland. The census taker made a mistake there, or she didn't want to admit being a German at that time. She was born 1884. I have their wedding certificate, her entry into the US, and family lore has her married to Arthur Rasmussen. I have family photos as well. I have them on censuses for Sheridan, MT since 1920, but not finding Demlangs.Thanks! Love the puzzle!