In looking at the Ellis Island record the name is not Serton, it is Anton, look at the n's above in his cousins name and in his father's name Anton. Simon would have been Simonas, which was probably difficult to understand.The cousin is Stanislaw Kowalewski, probably misspelled also,(Mother Maria) they were going to Detroit to Uncles Frank(z) Zielinski, Suwalki is one of the names, which may or may not mean the town.
There is a new governmentlisting of births/deaths/marriages at the gov. archives in Lithuania, but I think you need the names and towns. I don't know if it can be accessed from outside Lithuania, as my cousin there is doing the research. The records I've seen on my relatives have been in Lithuanian.
There are a lot of Wasilewski's on Ellis (399) You have a list of uncles and cousins from this immigration record, but not specific towns in Lithuania unless someone can read the Ellis Island better and match to towns in Lithuania.
In the history of Suwalki(Sulvaki), there is a town Raczki(1524) that probably survived locally.