Gjertrud Olsdtr - to Minnesota in 1887 ?

In 1887 Lars Anderson Farstad b.1821 left Trondheim, Norway. He was travelling together with Marit Olsdatter, and two children ; Olise and Inga. http://digitalarkivet.uib.no/cgi-win/webcens.exe?slag=visbase&sidenr=9&filnamn=EMITROND&gardpostnr=46327&merk=46327#ovre The childrens mother were Gjertrud Olsdatter, born in Neegaard, Surnadal 13 December 1854. Gjertrud was Marits sister. I can´t find Gjertrud among the emmigrants. Lars was a widower when he left, but he came back in 1889 and died later that year. When he came back he was married to Gjertrud and they had a child, Lydia, born in Minnesota 10 July 1887. http://da.digitalarkivet.no/ft/person/pf01036827004189/ Is there anyone who can find Gjertrud in the passenger lists ?