I'm researching my great-grandmother (Katarzyna) and her daughter (Wiktorya) who came to the US on the ship RHEIN in 1907. They were listed as having come from Laskowka, Galicia. The ship manifest indicated they were headed to McKeesport, PA, although I know Wiktorya ended up in Buffalo, NY because she married my grandfather John Olejarski. I have been unable to trace them back to Laskowka and cannot find a trace of Katarzyna after she arrived. Any suggestions on how to improve on the search.