Ingeborg Halvorsen

I am searching for my greatgrandmother Ingeborg Sofie Halvorsen born 20 April 1840 in Høland, Norway. She went to Erskine, MN, Polck County with "M/S" Thingvalla March 01 1894 arrived Ellis Island March 21 1894. I can't find her after that date. She had a son, halfbrother to my grandmother: Ludvig Olsen born Nov 02 1867, he married a Hilda and changed his last name to Gran. can anybody please help me with som questions about my greatgrandmother. Maybe she married, what did she do for a living, and when and where did she die? Maybe she changed her last name to: Lee or Halvorson. Inger sofie Olberg