I went to a seminar and what was surprising was go on the Ellis Island site and type in a family name that came early. You may find them going back and forth and they will give you that date and they would have to get a US Passport for that and then you could get that info from the court in the state they applied. and they will be coming from the home place in Irland if you don't know that town Good Luck I found that on Bob who just posted for his Langley family Phyllis www.ellisislandrecords.org and you do have to sign in and get a password but it is free