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Dear Ms. Sicher,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located one series titled Registers of Vessels Departing from New York, New York, 8/11/1917-12/31/1971 in the Records of the Immigration and Naturalization Service (Record Group 85) that may contain information about departures from New York between 1910-1920. The records are not yet digitized and available in the Catalog. For access to this series, please contact the National Archives at Washington - Textual Reference (RDT1) via email at firstname.lastname@example.org.
We suggest that you contact the National Archives of the European country where the persons may have arrived; and inquire about passenger arrival lists for ports of entry. You may wish to search UK & Ireland, Incoming Passenger Lists, 1878-1960 website for more information. There may be a fee for using Ancestry to access digitized records.
We hope this is helpful. Best of luck with your research!