Endrestad

I am looking for further information on a couple of siblings from the Vågå are that immigrated and then dissapeared of the map. Fredrik Olsen Endrestad born 04 Oct 1862 Emigrated May 29 1880 and I have found that he worked as a farm laborer for Rasmus Stone in Belle Rivers, Douglas County MN the same year. Here the trail ends. His sister Kari Olsdatter Endrestad born 17 July 1859 emigrated on 21 May 1881 with the same destination. I have no trace of her.