I am a Doolin. My family line goes to Daniel Doolin. There were 3 or 4 brothers who came from Ireland. The youngest stayed at home with the parents. Bill Doolin became an outlaw for the same reason most people at that time did, poverty.
You have proof showing the migration of the Doolins from Ireland. My father has hunted for some time and cannot find any listing in the boats. I started to wonder if they came into Nova Scotia and then down to the states.
If you would like to contact me I can talk to my father and get more information