Sobleskie
It's probably misspelled name - probably nobody possess this name in Poland. I suspect that the name was Sobieski or maybe Sobolewski - both quite popular here.
Kowalski Jan
known as the most common name in Poland (the majority of sample forms at Polish post offices is filled with this name exactly)
early 1900's
1899
Another not much useful info: at those times was no Poland on the maps officially..