Looking for any information for Patrick Cullen and wife Catherine Mallon. I only know of one son, Peter, probably born 1870's. He came to U.S. Still looking for his immigration record here. I would be most grateful for any assistance. Thank you, Rob
When would Peter Cullen have travelled to America? up until 1940 Federal census you are likely to find year of immigration, if alien or U.S. citizen, etc. but remember that he could have gone to Canada before arriving in U.S.
Where did he live in America? if he did apply for citizen ship he would have done so where he was living. Sometimes people put in an application but didn't actually complete the process - U.S. census records will say NA (naturalized) or PA (papers applied), etc.
https://www.familysearch.org/wiki/en/United_States_Census_Abbreviations(under 1910 census)
Naturalization Information
NA: Naturalized citizen
AL: Alien citizen (not a U.S. citizen)
PA: Papers, meaning the alien had submitted their first papers or declaration of intent to a court of record to begin the process of naturalizing
NR: No record, usually found only on soundex cards can also mean Not Registered
UN: (Un)Naturalized or not Naturalized
Another way to trace his movements might be from passenger lists of those leaving U.K. (1890-1960) on Ancestry or Find My Past (pay sites). If you get a likely record then you can try to look up the U.S. entry which will give more detail (be sure to look at both pages to get contact in U.S. as well as next of kin in home country).