The following link shows the index entry for the Naturalization Petition filed by my husband's great-uncle: <http://interactive.ancestry.com/7733/imusany1824_1175-00372/2445378> Next to the Petition No., and above his signature, there is an A.R.R. number listed. Does this number by any chance refer to a passenger arrival record? I have yet to find this family in any passenger list. I do know from another great-uncle's naturalization petition that they came through Hamburg approximately 1891, and that they were from the Bialystok/Grodno area. I also know from other records that the surname was originally something else, closer to Saminowitch or something like that. If this A.R.R. number by any chance identifies a passenger arrival record, how can I follow up on this? -- Thanks, Mary