The naturalization records for those years prior to 1906 or 7 are kept in the New Jersey State Archives in Trenton. they will do a search for $10.00 (I think), and they have a website with directions and phone numbers, etc. It is possible that she was not herself naturalized, as at that time if a man became a citizen, his wife and minor children automatically became citizens also. Maybe it was 1911 - whenever the Federal government took over - prior to that year (whatever it was) all naturalization records are in the state where the naturalization took place. Good luck. (Having searched myself, I can also tell you that these papers contain virtually no useful information.) Elizabeth