I am not at all fond of paying for information, but Ancestry.com has excellent and easily searchable immigration records. If you can get to Ancestry through a genealogy society membership, as we can in the states, then there's direct no charge to you. << >I am asking this for a friend in England- how and where would one > find records of people who immigrated to the US and (probably) became > citizens, around 1900? I am sure there are federal records, but I > have no idea where they would be or who to contact to get information. > >>