Migrating from Sweden To australia c 1867

I am hoping someone out there can help me, I am trying to find the passenger list for a Israel Tjernstom ( born 1841)and Jonas Vilhem Tjernstrom ( 1844) who lived in Sundvall Sweden and migrated to Australia about 1867. I remember hearing of a ship the Vidfarne. But this could be just heresay. There is a possibity, they were working on the ship. and possibly ( according to old stories) jumped ship in South Australia Any help would be greatly appreciated Maureen Charnstrom [email hidden]