Where exactly did my ancestors disembark in New York when they arrived from Ireland?
I don’t know if this helps, but here is the index of U.S. ports of arrival for those years. Scroll down to New York. It lists Castle Garden, Barge Office and Ellis Island separately, so perhaps Ellis Island wasn’t the only point to enter. My grandfather and his brothers arrived from Ireland to New York City in the 1920s and they are not listed in the Ellis Island records either. I’ve always meant to look them up on the passenger lists from Ireland. Having the name of the boat they arrived on is a great help.