Hans Nelson/Kirsti Andersd - Sogndal emigr. 1871?

Dear Listers! I have for many years tried to find the emigration record/passenger list showing this family: Hans Nilsson (Aasen), born Jostedal Apr. 22, 1842 married in Sogndal Jan. 28, 1867 Kirsti Andersdotter (Kolsete/Ormelseng), born Hafslo May 30, 1845 The couple resided a few years in Sogndal, partly at Kolsete and partly at Gjerde, and had two sons: * Nils, born in Sogndal Apr. 1, 1869 * Andreas, born in Sogndal Nov. 6, 1870 Hans, Kirsti, Nils and Andreas supposedly emigrated in 1871 or 1872, and Kirsti the mother is believed to have died in Vernon Co.,. WI in 1872 or 1873, possibly in childbirth? 1900 census for Hans Nelson suggests emigration year 1871: https://www.familysearch.org/ark:/61903/3:1:S3HY-6SW9-QMX 1900 census for son Nels H. Nelson also suggests emigration year 1871: https://www.familysearch.org/ark:/61903/3:1:S3HY-6SW9-QWT 1910 census for son Andrew Nelson suggests emigration year 1872: https://www.familysearch.org/ark:/61903/3:1:33SQ-GYYV-SQ4R I would be delighted if anyone can manage to find this passenger record, and I thank you very much in advance for your great assistance! The death record (or a cemetery stone?) for Kirsti would also be very welcome! Very sincerely yours,