I am trying to track down a passenger list for my great grandparents who came to the US in 1874 - 1876 from Prussia.   The surname is SKOLASKY (also sometimes spelled SKOLASKI) ;first names are Joseph and Mary Bieschke and they had 2 of their children with them - Rose and Joseph   Any info or direction on where to search would be appreciated. I've tried all the usual sites and travel routes without success.   Thank you.