Cate and list, Bill's reply inadvertently got directed to me rather than the list.
Also, Jim La Polla said something very similar. Thanks for your help, guys!!!
At first, when there weren't many families,they either traveled
to New Jersey or
Manhattan. Later, when there were enough families, a priest would travel from
Manhattan to SI to say mass once a month at someone's home. Finally as more and
more Catholic families moved to SI, parishes were formed. The first was St
Peter's in 1839. Since Catholic sacramental records are always kept at the
parish level, any records pre 1839 are probably at the church of the priest who
traveled from Manhattan to SI. I'd contact the NY Diocese Archivist. That person
is at the St. Joseph's Seminary in Dunwoodie, NY. I don't have the address with
me, but you can get it on the internet.