BJORN RUND/WHAT SHIP??

I am pretty new to this- I need some help [:I] *ship/date (I've searched and searched...) *why wife died in Aust-Agder, if they immigrated to US *any additional stuff[:I][:I] Here's some of what I know (from familysearch.org) They're from Krodsherad, Buskerud, Sigdal Parish BJORN TRULSEN RUND (1854-1931) married HANNAH STORMO in 1880, in Norway They immigrated to South Dakota. Had my great grandpa, Clarence Rund. Let me know if you need additional information- I have it