The Society for German Genealogy in Eastern Europe http;//www.sggee.org has Lifke / Liefke in its databases but your Samuel is not there.

Lifke might also Litke according to our databases but I'm not sure if that is a true variant spelling or if that represents a problem in deciphering the handwritten versions.

The ideal would be to determine a location or at least parish of residence in Russian Poland as it was a big place. Have you found a ship record yet?

Jerry