My grandmother Anna was adopted when she was two years old in 1899. She was born in Langesund, Telemark, in 1897. She had a sister by the name of Martha Knudsen who was born in 1893 in Skien.. Her father's name was Ole Knudsen (born 1855) and her mother was Maren Elise Jensen, nee Andreassen (born 1861). My grandmother's mother died in 1899 and my grandmother was adopted by another family. The 1900 census for Langesund shows widower Ole, who was a shoemaker, living in Stenvikveien 137 with daughter Martha. I am trying to find Martha but have been unable to locate where she went after 1900. Does anyone have any information on Ole and his daughter Martha? Any assistance would be appreciated. Thank you!